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128012753 = 11101115223
BaseRepresentation
bin1111010000101…
…01000111010001
322220212201111002
413220111013101
5230232402003
620411431345
73113043011
oct750250721
9286781432
10128012753
1166294970
1236a55555
13206a10bb
1413003c41
15b389a88
hex7a151d1

128012753 has 8 divisors (see below), whose sum is σ = 141034176. Its totient is φ = 115222000.

The previous prime is 128012749. The next prime is 128012777. The reversal of 128012753 is 357210821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128012753 - 22 = 128012749 is a prime.

It is a super-3 number, since 3×1280127533 (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128012723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56501 + ... + 58722.

It is an arithmetic number, because the mean of its divisors is an integer number (17629272).

Almost surely, 2128012753 is an apocalyptic number.

It is an amenable number.

128012753 is a deficient number, since it is larger than the sum of its proper divisors (13021423).

128012753 is a wasteful number, since it uses less digits than its factorization.

128012753 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115335.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 128012753 is about 11314.2720932458. The cubic root of 128012753 is about 503.9851566658.

The spelling of 128012753 in words is "one hundred twenty-eight million, twelve thousand, seven hundred fifty-three".

Divisors: 1 11 101 1111 115223 1267453 11637523 128012753