1251438882 has 16 divisors (see below), whose sum is σ = 2517867072. Its totient is φ = 414648080.

The previous prime is 1251438871. The next prime is 1251438893. The reversal of 1251438882 is 2888341521.

It is an interprime number because it is at equal distance from previous prime (1251438871) and next prime (1251438893).

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, 623469 + ... + 625472.

It is an arithmetic number, because the mean of its divisors is an integer number (157366692).

Almost surely, 2^1251438882 is an apocalyptic number.

1251438882 is an abundant number, since it is smaller than the sum of its proper divisors (1266428190).

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

1251438882 is a wasteful number, since it uses less digits than its factorization.

1251438882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1249113.

The product of its digits is 122880, while the sum is 42.

The square root of 1251438882 is about 35375.6820711630. The cubic root of 1251438882 is about 1077.6305168278.

The spelling of 1251438882 in words is "one billion, two hundred fifty-one million, four hundred thirty-eight thousand, eight hundred eighty-two".