1257795970 has 16 divisors (see below), whose sum is σ = 2264546808. Its totient is φ = 503004160.

The previous prime is 1257795943. The next prime is 1257795989. The reversal of 1257795970 is 795977521.

It can be written as a sum of positive squares in 4 ways, for example, as 705592969 + 552203001 = 26563^2 + 23499^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42852 + ... + 65968.

Almost surely, 2^1257795970 is an apocalyptic number.

1257795970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1257795970 is a deficient number, since it is larger than the sum of its proper divisors (1006750838).

1257795970 is a wasteful number, since it uses less digits than its factorization.

1257795970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28565.

The product of its (nonzero) digits is 1389150, while the sum is 52.

The square root of 1257795970 is about 35465.4193546333. The cubic root of 1257795970 is about 1079.4521598500.

The spelling of 1257795970 in words is "one billion, two hundred fifty-seven million, seven hundred ninety-five thousand, nine hundred seventy".