1972864 has 16 divisors (see below), whose sum is σ = 3930570. Its totient is φ = 986368.

The previous prime is 1972849. The next prime is 1972889. The reversal of 1972864 is 4682791.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 627264 = 1160^2 + 792^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7579 + ... + 7834.

2^1972864 is an apocalyptic number.

It is an amenable number.

1972864 is a deficient number, since it is larger than the sum of its proper divisors (1957706).

1972864 is an equidigital number, since it uses as much as digits as its factorization.

1972864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15427 (or 15415 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 1972864 is about 1404.5867719725. The cubic root of 1972864 is about 125.4196879856.

The spelling of 1972864 in words is "one million, nine hundred seventy-two thousand, eight hundred sixty-four".