1391545572 has 12 divisors (see below), whose sum is σ = 3246939696. Its totient is φ = 463848520.

The previous prime is 1391545537. The next prime is 1391545583. The reversal of 1391545572 is 2755451931.

It is a happy number.

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, 57981054 + ... + 57981077.

It is an arithmetic number, because the mean of its divisors is an integer number (270578308).

Almost surely, 2^1391545572 is an apocalyptic number.

1391545572 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1391545572 is an abundant number, since it is smaller than the sum of its proper divisors (1855394124).

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

1391545572 is a wasteful number, since it uses less digits than its factorization.

1391545572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115962138 (or 115962136 counting only the distinct ones).

The product of its digits is 189000, while the sum is 42.

The square root of 1391545572 is about 37303.4257408083. The cubic root of 1391545572 is about 1116.4325188526.

The spelling of 1391545572 in words is "one billion, three hundred ninety-one million, five hundred forty-five thousand, five hundred seventy-two".