156256401 has 16 divisors (see below), whose sum is σ = 252111744. Its totient is φ = 84036864.

The previous prime is 156256363. The next prime is 156256409. The reversal of 156256401 is 104652651.

It is not a de Polignac number, because 156256401 - 2⁹ = 156255889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (156256409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218490 + ... + 219203.

It is an arithmetic number, because the mean of its divisors is an integer number (15756984).

Almost surely, 2^156256401 is an apocalyptic number.

It is an amenable number.

156256401 is a deficient number, since it is larger than the sum of its proper divisors (95855343).

156256401 is a wasteful number, since it uses less digits than its factorization.

156256401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437720.

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 156256401 is about 12500.2560373778. The cubic root of 156256401 is about 538.6160273603.

The spelling of 156256401 in words is "one hundred fifty-six million, two hundred fifty-six thousand, four hundred one".