156420425 has 24 divisors (see below), whose sum is σ = 222235776. Its totient is φ = 106986240.

The previous prime is 156420413. The next prime is 156420443. The reversal of 156420425 is 524024651.

It is not a de Polignac number, because 156420425 - 2⁶ = 156420361 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87137 + ... + 88913.

It is an arithmetic number, because the mean of its divisors is an integer number (9259824).

Almost surely, 2^156420425 is an apocalyptic number.

It is an amenable number.

156420425 is a deficient number, since it is larger than the sum of its proper divisors (65815351).

156420425 is a wasteful number, since it uses less digits than its factorization.

156420425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2297 (or 2292 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 156420425 is about 12506.8151421535. The cubic root of 156420425 is about 538.8044251052.

The spelling of 156420425 in words is "one hundred fifty-six million, four hundred twenty thousand, four hundred twenty-five".