156409401 has 24 divisors (see below), whose sum is σ = 224134560. Its totient is φ = 96988672.

The previous prime is 156409391. The next prime is 156409403. The reversal of 156409401 is 104904651.

It is a happy number.

156409401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 156409401 - 2⁵ = 156409369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (156409403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 76150 + ... + 78176.

It is an arithmetic number, because the mean of its divisors is an integer number (9338940).

Almost surely, 2^156409401 is an apocalyptic number.

It is an amenable number.

156409401 is a deficient number, since it is larger than the sum of its proper divisors (67725159).

156409401 is a wasteful number, since it uses less digits than its factorization.

156409401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2153 (or 2136 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 156409401 is about 12506.3744146735. The cubic root of 156409401 is about 538.7917670832.

The spelling of 156409401 in words is "one hundred fifty-six million, four hundred nine thousand, four hundred one".