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130621115 = 5171536719
BaseRepresentation
bin1111100100100…
…01111010111011
3100002210020111002
413302101322323
5231414333430
620543355215
73144155402
oct762217273
9302706432
10130621115
1167806639
12378b2b0b
13210a5401
14134c2639
15b702845
hex7c91ebb

130621115 has 8 divisors (see below), whose sum is σ = 165965760. Its totient is φ = 98349952.

The previous prime is 130621109. The next prime is 130621129. The reversal of 130621115 is 511126031.

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 130621115 - 28 = 130620859 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768275 + ... + 768444.

It is an arithmetic number, because the mean of its divisors is an integer number (20745720).

Almost surely, 2130621115 is an apocalyptic number.

130621115 is a deficient number, since it is larger than the sum of its proper divisors (35344645).

130621115 is a wasteful number, since it uses less digits than its factorization.

130621115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536741.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 130621115 is about 11428.9594889474. The cubic root of 130621115 is about 507.3852005618.

Adding to 130621115 its reverse (511126031), we get a palindrome (641747146).

The spelling of 130621115 in words is "one hundred thirty million, six hundred twenty-one thousand, one hundred fifteen".

Divisors: 1 5 17 85 1536719 7683595 26124223 130621115