2490643 has 4 divisors (see below), whose sum is σ = 2514928. Its totient is φ = 2466360.

The previous prime is 2490637. The next prime is 2490659. The reversal of 2490643 is 3460942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3460942 = 2 ⋅1730471.

It is a cyclic number.

It is not a de Polignac number, because 2490643 - 2¹³ = 2482451 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 (2490613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11988 + ... + 12193.

It is an arithmetic number, because the mean of its divisors is an integer number (628732).

2^2490643 is an apocalyptic number.

2490643 is a deficient number, since it is larger than the sum of its proper divisors (24285).

2490643 is a wasteful number, since it uses less digits than its factorization.

2490643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24284.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 2490643 is about 1578.1771130009. The cubic root of 2490643 is about 135.5513437681.

Subtracting 2490643 from its reverse (3460942), we obtain a cube (970299 = 99³).

The spelling of 2490643 in words is "two million, four hundred ninety thousand, six hundred forty-three".