156404425 has 6 divisors (see below), whose sum is σ = 193941518. Its totient is φ = 125123520.

The previous prime is 156404411. The next prime is 156404429. The reversal of 156404425 is 524404651.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1750329 + 154654096 = 1323^2 + 12436^2 .

It is not a de Polignac number, because 156404425 - 2²³ = 148015817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (156404429) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3128064 + ... + 3128113.

Almost surely, 2^156404425 is an apocalyptic number.

It is an amenable number.

156404425 is a deficient number, since it is larger than the sum of its proper divisors (37537093).

156404425 is an equidigital number, since it uses as much as digits as its factorization.

156404425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6256187 (or 6256182 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 156404425 is about 12506.1754745406. The cubic root of 156404425 is about 538.7860533255.

The spelling of 156404425 in words is "one hundred fifty-six million, four hundred four thousand, four hundred twenty-five".