1257725372 has 12 divisors (see below), whose sum is σ = 2212081200. Its totient is φ = 625702176.

The previous prime is 1257725347. The next prime is 1257725393. The reversal of 1257725372 is 2735277521.

It is a happy number.

It is a super-2 number, since 2×1257725372² = 3163746222745076768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789233 + ... + 790824.

It is an arithmetic number, because the mean of its divisors is an integer number (184340100).

Almost surely, 2^1257725372 is an apocalyptic number.

It is an amenable number.

1257725372 is a deficient number, since it is larger than the sum of its proper divisors (954355828).

1257725372 is a wasteful number, since it uses less digits than its factorization.

1257725372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580260 (or 1580258 counting only the distinct ones).

The product of its digits is 205800, while the sum is 41.

The square root of 1257725372 is about 35464.4240331068. The cubic root of 1257725372 is about 1079.4319635194.

The spelling of 1257725372 in words is "one billion, two hundred fifty-seven million, seven hundred twenty-five thousand, three hundred seventy-two".