1865972 has 12 divisors (see below), whose sum is σ = 3275076. Its totient is φ = 930240.

The previous prime is 1865959. The next prime is 1865987. The reversal of 1865972 is 2795681.

It can be written as a sum of positive squares in 2 ways, for example, as 5476 + 1860496 = 74^2 + 1364^2 .

It is a congruent number.

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, 2072 + ... + 2832.

It is an arithmetic number, because the mean of its divisors is an integer number (272923).

2^1865972 is an apocalyptic number.

It is an amenable number.

1865972 is a deficient number, since it is larger than the sum of its proper divisors (1409104).

1865972 is a wasteful number, since it uses less digits than its factorization.

1865972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1378 (or 1376 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 1865972 is about 1366.0058565028. The cubic root of 1865972 is about 123.1123744430.

The spelling of 1865972 in words is "one million, eight hundred sixty-five thousand, nine hundred seventy-two".