156602401 has 2 divisors, whose sum is σ = 156602402. Its totient is φ = 156602400.

The previous prime is 156602399. The next prime is 156602429. The reversal of 156602401 is 104206651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141039376 + 15563025 = 11876^2 + 3945^2 .

It is a cyclic number.

It is not a de Polignac number, because 156602401 - 2¹ = 156602399 is a prime.

Together with 156602399, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (156602441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78301200 + 78301201.

It is an arithmetic number, because the mean of its divisors is an integer number (78301201).

Almost surely, 2^156602401 is an apocalyptic number.

It is an amenable number.

156602401 is a deficient number, since it is larger than the sum of its proper divisors (1).

156602401 is an equidigital number, since it uses as much as digits as its factorization.

156602401 is an evil number, because the sum of its binary digits is even.

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

The square root of 156602401 is about 12514.0881010164. The cubic root of 156602401 is about 539.0132884421.

The spelling of 156602401 in words is "one hundred fifty-six million, six hundred two thousand, four hundred one".