156424001 has 4 divisors (see below), whose sum is σ = 157288404. Its totient is φ = 155559600.

The previous prime is 156423961. The next prime is 156424003. The reversal of 156424001 is 100424651.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 35093776 + 121330225 = 5924^2 + 11015^2 .

It is a cyclic number.

It is not a de Polignac number, because 156424001 - 2²² = 152229697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156424003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 431930 + ... + 432291.

It is an arithmetic number, because the mean of its divisors is an integer number (39322101).

Almost surely, 2^156424001 is an apocalyptic number.

It is an amenable number.

156424001 is a deficient number, since it is larger than the sum of its proper divisors (864403).

156424001 is an equidigital number, since it uses as much as digits as its factorization.

156424001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864402.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 156424001 is about 12506.9581033919. The cubic root of 156424001 is about 538.8085310267.

Adding to 156424001 its reverse (100424651), we get a palindrome (256848652).

The spelling of 156424001 in words is "one hundred fifty-six million, four hundred twenty-four thousand, one".