1865956 has 9 divisors (see below), whose sum is σ = 3270211. Its totient is φ = 931612.

The previous prime is 1865939. The next prime is 1865957. The reversal of 1865956 is 6595681.

The square root of 1865956 is 1366.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1865957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2391 + ... + 3073.

2^1865956 is an apocalyptic number.

1865956 is the 1366-th square number.

It is an amenable number.

1865956 is a deficient number, since it is larger than the sum of its proper divisors (1404255).

1865956 is an frugal number, since it uses more digits than its factorization.

1865956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370 (or 685 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The cubic root of 1865956 is about 123.1120225614.

It can be divided in two parts, 186 and 5956, that multiplied together give a triangular number (1107816 = T₁₄₈₈).

The spelling of 1865956 in words is "one million, eight hundred sixty-five thousand, nine hundred fifty-six".