1556424725 has 24 divisors (see below), whose sum is σ = 1961749440. Its totient is φ = 1224720000.

The previous prime is 1556424713. The next prime is 1556424731. The reversal of 1556424725 is 5274246551.

It is not a de Polignac number, because 1556424725 - 2¹⁴ = 1556408341 is a prime.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 1066046 + ... + 1067504.

It is an arithmetic number, because the mean of its divisors is an integer number (81739560).

Almost surely, 2^1556424725 is an apocalyptic number.

It is an amenable number.

1556424725 is a deficient number, since it is larger than the sum of its proper divisors (405324715).

1556424725 is a wasteful number, since it uses less digits than its factorization.

1556424725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141 (or 2136 counting only the distinct ones).

The product of its digits is 336000, while the sum is 41.

The square root of 1556424725 is about 39451.5490823871. The cubic root of 1556424725 is about 1158.8913121249.

The spelling of 1556424725 in words is "one billion, five hundred fifty-six million, four hundred twenty-four thousand, seven hundred twenty-five".