1257925972 has 6 divisors (see below), whose sum is σ = 2201370458. Its totient is φ = 628962984.

The previous prime is 1257925969. The next prime is 1257925979. The reversal of 1257925972 is 2795297521.

It can be written as a sum of positive squares in only one way, i.e., 956417476 + 301508496 = 30926^2 + 17364^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1257925979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157240743 + ... + 157240750.

Almost surely, 2^1257925972 is an apocalyptic number.

It is an amenable number.

1257925972 is a deficient number, since it is larger than the sum of its proper divisors (943444486).

1257925972 is a wasteful number, since it uses less digits than its factorization.

1257925972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 314481497 (or 314481495 counting only the distinct ones).

The product of its digits is 793800, while the sum is 49.

The square root of 1257925972 is about 35467.2521066970. The cubic root of 1257925972 is about 1079.4893482092.

The spelling of 1257925972 in words is "one billion, two hundred fifty-seven million, nine hundred twenty-five thousand, nine hundred seventy-two".