2491956 has 18 divisors (see below), whose sum is σ = 6299202. Its totient is φ = 830640.

The previous prime is 2491949. The next prime is 2491961. The reversal of 2491956 is 6591942.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 435600 = 1434^2 + 660^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 69221 = 2491956 / (2 + 4 + 9 + 1 + 9 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 2491956.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34575 + ... + 34646.

2^2491956 is an apocalyptic number.

It is an amenable number.

2491956 is an abundant number, since it is smaller than the sum of its proper divisors (3807246).

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

2491956 is a wasteful number, since it uses less digits than its factorization.

2491956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69231 (or 69226 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 2491956 is about 1578.5930444545. The cubic root of 2491956 is about 135.5751592579.

The spelling of 2491956 in words is "two million, four hundred ninety-one thousand, nine hundred fifty-six".