2491264 has 16 divisors (see below), whose sum is σ = 4963320. Its totient is φ = 1245568.

The previous prime is 2491259. The next prime is 2491289. The reversal of 2491264 is 4621942.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9604 + ... + 9859.

2^2491264 is an apocalyptic number.

It is an amenable number.

2491264 is a deficient number, since it is larger than the sum of its proper divisors (2472056).

2491264 is an equidigital number, since it uses as much as digits as its factorization.

2491264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19477 (or 19465 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 2491264 is about 1578.3738467169. The cubic root of 2491264 is about 135.5626086489.

It can be divided in two parts, 24912 and 64, that added together give a triangular number (24976 = T₂₂₃).

The spelling of 2491264 in words is "two million, four hundred ninety-one thousand, two hundred sixty-four".