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128852901 = 3214316989
BaseRepresentation
bin1111010111000…
…10001110100101
322222110101221200
413223202032211
5230441243101
620441433113
73123142302
oct753421645
9288411850
10128852901
1166809101
123719b799
1320906628
14131820a9
15b4a3986
hex7ae23a5

128852901 has 6 divisors (see below), whose sum is σ = 186120870. Its totient is φ = 85901928.

The previous prime is 128852891. The next prime is 128852939. The reversal of 128852901 is 109258821.

128852901 is a `hidden beast` number, since 128 + 8 + 529 + 0 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 76580001 + 52272900 = 8751^2 + 7230^2 .

It is not a de Polignac number, because 128852901 - 25 = 128852869 is a prime.

It is a super-2 number, since 2×1288529012 = 33206140192231602, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128852201) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7158486 + ... + 7158503.

It is an arithmetic number, because the mean of its divisors is an integer number (31020145).

Almost surely, 2128852901 is an apocalyptic number.

It is an amenable number.

128852901 is a deficient number, since it is larger than the sum of its proper divisors (57267969).

128852901 is a wasteful number, since it uses less digits than its factorization.

128852901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14316995 (or 14316992 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 128852901 is about 11351.3391720977. The cubic root of 128852901 is about 505.0853053292.

The spelling of 128852901 in words is "one hundred twenty-eight million, eight hundred fifty-two thousand, nine hundred one".

Divisors: 1 3 9 14316989 42950967 128852901