2500491 has 32 divisors (see below), whose sum is σ = 4128768. Its totient is φ = 1314720.

The previous prime is 2500441. The next prime is 2500523. The reversal of 2500491 is 1940052.

2500491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2500491 - 2⁷ = 2500363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14890 + ... + 15056.

It is an arithmetic number, because the mean of its divisors is an integer number (129024).

2^2500491 is an apocalyptic number.

2500491 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2500491 is a deficient number, since it is larger than the sum of its proper divisors (1628277).

2500491 is a wasteful number, since it uses less digits than its factorization.

2500491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 2500491 is about 1581.2940902944. The cubic root of 2500491 is about 135.7297654418.

The spelling of 2500491 in words is "two million, five hundred thousand, four hundred ninety-one".