1257018132 has 48 divisors (see below), whose sum is σ = 3031895552. Its totient is φ = 404922240.

The previous prime is 1257018109. The next prime is 1257018179. The reversal of 1257018132 is 2318107521.

It is a self number, because there is not a number n which added to its sum of digits gives 1257018132.

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, 324318 + ... + 328170.

Almost surely, 2^1257018132 is an apocalyptic number.

1257018132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1257018132 is an abundant number, since it is smaller than the sum of its proper divisors (1774877420).

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

1257018132 is a wasteful number, since it uses less digits than its factorization.

1257018132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4768 (or 4766 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The square root of 1257018132 is about 35454.4515117637. The cubic root of 1257018132 is about 1079.2295980382.

The spelling of 1257018132 in words is "one billion, two hundred fifty-seven million, eighteen thousand, one hundred thirty-two".