156432401 has 2 divisors, whose sum is σ = 156432402. Its totient is φ = 156432400.

The previous prime is 156432379. The next prime is 156432413. The reversal of 156432401 is 104234651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142181776 + 14250625 = 11924^2 + 3775^2 .

It is a cyclic number.

It is not a de Polignac number, because 156432401 - 2¹⁸ = 156170257 is a prime.

It is not a weakly prime, because it can be changed into another prime (156432481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78216200 + 78216201.

It is an arithmetic number, because the mean of its divisors is an integer number (78216201).

Almost surely, 2^156432401 is an apocalyptic number.

It is an amenable number.

156432401 is a deficient number, since it is larger than the sum of its proper divisors (1).

156432401 is an equidigital number, since it uses as much as digits as its factorization.

156432401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 156432401 is about 12507.2939119539. The cubic root of 156432401 is about 538.8181755625.

The spelling of 156432401 in words is "one hundred fifty-six million, four hundred thirty-two thousand, four hundred one".