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127803025 = 5272172192
BaseRepresentation
bin1111001111000…
…01111010010001
322220111001210101
413213201322101
5230204144100
620403132401
73111210400
oct747417221
9286431711
10127803025
1166161339
1236974101
13206297bc
1412d8b637
15b34786a
hex79e1e91

127803025 has 81 divisors (see below), whose sum is σ = 206680689. Its totient is φ = 78140160.

The previous prime is 127803017. The next prime is 127803031. The reversal of 127803025 is 520308721.

The square root of 127803025 is 11305.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 2989441 + 124813584 = 1729^2 + 11172^2 .

It is not a de Polignac number, because 127803025 - 23 = 127803017 is a prime.

It is a super-2 number, since 2×1278030252 = 32667226398301250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 127802984 and 127803002.

It is an unprimeable number.

It is a polite number, since it can be written in 80 ways as a sum of consecutive naturals, for example, 6726466 + ... + 6726484.

Almost surely, 2127803025 is an apocalyptic number.

127803025 is the 11305-th square number.

127803025 is the 5653-rd centered octagonal number.

It is an amenable number.

127803025 is a deficient number, since it is larger than the sum of its proper divisors (78877664).

127803025 is a wasteful number, since it uses less digits than its factorization.

127803025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96 (or 48 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The cubic root of 127803025 is about 503.7097737502.

The spelling of 127803025 in words is "one hundred twenty-seven million, eight hundred three thousand, twenty-five".

Divisors: 1 5 7 17 19 25 35 49 85 95 119 133 175 245 289 323 361 425 475 595 665 833 931 1225 1445 1615 1805 2023 2261 2527 2975 3325 4165 4655 5491 6137 7225 8075 9025 10115 11305 12635 14161 15827 17689 20825 23275 27455 30685 38437 42959 50575 56525 63175 70805 79135 88445 104329 137275 153425 192185 214795 269059 300713 354025 395675 442225 521645 730303 960925 1073975 1345295 1503565 2608225 3651515 5112121 6726475 7517825 18257575 25560605 127803025