1257977996 has 18 divisors (see below), whose sum is σ = 2402043588. Its totient is φ = 571701240.

The previous prime is 1257977989. The next prime is 1257978017. The reversal of 1257977996 is 6997797521.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 232595 + ... + 237941.

It is an arithmetic number, because the mean of its divisors is an integer number (133446866).

Almost surely, 2^1257977996 is an apocalyptic number.

It is an amenable number.

1257977996 is a deficient number, since it is larger than the sum of its proper divisors (1144065592).

1257977996 is an frugal number, since it uses more digits than its factorization.

1257977996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10709 (or 5360 counting only the distinct ones).

The product of its digits is 15002820, while the sum is 62.

The square root of 1257977996 is about 35467.9855080606. The cubic root of 1257977996 is about 1079.5042294717.

The spelling of 1257977996 in words is "one billion, two hundred fifty-seven million, nine hundred seventy-seven thousand, nine hundred ninety-six".