1257425624 has 64 divisors (see below), whose sum is σ = 3054508800. Its totient is φ = 471256704.

The previous prime is 1257425591. The next prime is 1257425633. The reversal of 1257425624 is 4265247521.

It is a super-2 number, since 2×1257425624² = 3162238399783578752, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31622 + ... + 59285.

It is an arithmetic number, because the mean of its divisors is an integer number (47726700).

Almost surely, 2^1257425624 is an apocalyptic number.

1257425624 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1257425624 is an abundant number, since it is smaller than the sum of its proper divisors (1797083176).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1257425624 is a wasteful number, since it uses less digits than its factorization.

1257425624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90952 (or 90948 counting only the distinct ones).

The product of its digits is 134400, while the sum is 38.

The square root of 1257425624 is about 35460.1977433855. The cubic root of 1257425624 is about 1079.3462046602.

The spelling of 1257425624 in words is "one billion, two hundred fifty-seven million, four hundred twenty-five thousand, six hundred twenty-four".