2491756 has 12 divisors (see below), whose sum is σ = 4393368. Its totient is φ = 1236512.

The previous prime is 2491729. The next prime is 2491757. The reversal of 2491756 is 6571942.

It is not an unprimeable number, because it can be changed into a prime (2491757) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1726 + ... + 2821.

It is an arithmetic number, because the mean of its divisors is an integer number (366114).

2^2491756 is an apocalyptic number.

It is an amenable number.

2491756 is a deficient number, since it is larger than the sum of its proper divisors (1901612).

2491756 is a wasteful number, since it uses less digits than its factorization.

2491756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4688 (or 4686 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 2491756 is about 1578.5296956345. The cubic root of 2491756 is about 135.5715321530.

The spelling of 2491756 in words is "two million, four hundred ninety-one thousand, seven hundred fifty-six".