1257945932 has 6 divisors (see below), whose sum is σ = 2201405388. Its totient is φ = 628972964.

The previous prime is 1257945907. The next prime is 1257945959. The reversal of 1257945932 is 2395497521.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 157243238 + ... + 157243245.

It is an arithmetic number, because the mean of its divisors is an integer number (366900898).

Almost surely, 2^1257945932 is an apocalyptic number.

It is an amenable number.

1257945932 is a deficient number, since it is larger than the sum of its proper divisors (943459456).

1257945932 is a wasteful number, since it uses less digits than its factorization.

1257945932 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314486487 (or 314486485 counting only the distinct ones).

The product of its digits is 680400, while the sum is 47.

The square root of 1257945932 is about 35467.5334919134. The cubic root of 1257945932 is about 1079.4950577380.

The spelling of 1257945932 in words is "one billion, two hundred fifty-seven million, nine hundred forty-five thousand, nine hundred thirty-two".