2491749 has 32 divisors (see below), whose sum is σ = 4121600. Its totient is φ = 1477440.

The previous prime is 2491729. The next prime is 2491757. The reversal of 2491749 is 9471942.

It is not a de Polignac number, because 2491749 - 2⁸ = 2491493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491729) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10767 + ... + 10995.

It is an arithmetic number, because the mean of its divisors is an integer number (128800).

2^2491749 is an apocalyptic number.

It is an amenable number.

2491749 is a deficient number, since it is larger than the sum of its proper divisors (1629851).

2491749 is a wasteful number, since it uses less digits than its factorization.

2491749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282 (or 276 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2491749 is about 1578.5274783798. The cubic root of 2491749 is about 135.5714052008.

It can be divided in two parts, 2491 and 749, that added together give a triangular number (3240 = T₈₀).

The spelling of 2491749 in words is "two million, four hundred ninety-one thousand, seven hundred forty-nine".