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156420601 is a prime number
BaseRepresentation
bin10010101001011…
…00100111111001
3101220022222201121
421110230213321
5310020424401
623304345241
73606360511
oct1124544771
9356288647
10156420601
1180328127
1244475221
132653948c
1416aba841
15daebca1
hex952c9f9

156420601 has 2 divisors, whose sum is σ = 156420602. Its totient is φ = 156420600.

The previous prime is 156420599. The next prime is 156420613. The reversal of 156420601 is 106024651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143424576 + 12996025 = 11976^2 + 3605^2 .

It is a cyclic number.

It is not a de Polignac number, because 156420601 - 21 = 156420599 is a prime.

Together with 156420599, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (156430601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78210300 + 78210301.

It is an arithmetic number, because the mean of its divisors is an integer number (78210301).

Almost surely, 2156420601 is an apocalyptic number.

It is an amenable number.

156420601 is a deficient number, since it is larger than the sum of its proper divisors (1).

156420601 is an equidigital number, since it uses as much as digits as its factorization.

156420601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 156420601 is about 12506.8221783153. The cubic root of 156420601 is about 538.8046271878.

The spelling of 156420601 in words is "one hundred fifty-six million, four hundred twenty thousand, six hundred one".