2491265 has 32 divisors (see below), whose sum is σ = 3732480. Its totient is φ = 1557504.

The previous prime is 2491259. The next prime is 2491289. The reversal of 2491265 is 5621942.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2491265 - 2⁸ = 2491009 is a prime.

It is an Ulam number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 31496 + ... + 31574.

It is an arithmetic number, because the mean of its divisors is an integer number (116640).

2^2491265 is an apocalyptic number.

It is an amenable number.

2491265 is a deficient number, since it is larger than the sum of its proper divisors (1241215).

2491265 is a wasteful number, since it uses less digits than its factorization.

2491265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161.

The product of its digits is 4320, while the sum is 29.

The square root of 2491265 is about 1578.3741634986. The cubic root of 2491265 is about 135.5626267873.

The spelling of 2491265 in words is "two million, four hundred ninety-one thousand, two hundred sixty-five".