1257989484 has 12 divisors (see below), whose sum is σ = 2935308824. Its totient is φ = 419329824.

The previous prime is 1257989471. The next prime is 1257989527. The reversal of 1257989484 is 4849897521.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52416217 + ... + 52416240.

Almost surely, 2^1257989484 is an apocalyptic number.

It is an amenable number.

1257989484 is an abundant number, since it is smaller than the sum of its proper divisors (1677319340).

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

1257989484 is a wasteful number, since it uses less digits than its factorization.

1257989484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104832464 (or 104832462 counting only the distinct ones).

The product of its digits is 5806080, while the sum is 57.

The square root of 1257989484 is about 35468.1474565560. The cubic root of 1257989484 is about 1079.5075155140.

The spelling of 1257989484 in words is "one billion, two hundred fifty-seven million, nine hundred eighty-nine thousand, four hundred eighty-four".