1275138384 has 40 divisors (see below), whose sum is σ = 3547502112. Its totient is φ = 392350080.

The previous prime is 1275138343. The next prime is 1275138391. The reversal of 1275138384 is 4838315721.

It is a congruent number.

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, 1021122 + ... + 1022369.

Almost surely, 2^1275138384 is an apocalyptic number.

It is an amenable number.

1275138384 is an abundant number, since it is smaller than the sum of its proper divisors (2272363728).

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

1275138384 is a wasteful number, since it uses less digits than its factorization.

1275138384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2043515 (or 2043509 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 1275138384 is about 35709.0798537291. The cubic root of 1275138384 is about 1084.3906717654.

The spelling of 1275138384 in words is "one billion, two hundred seventy-five million, one hundred thirty-eight thousand, three hundred eighty-four".