2504731 has 4 divisors (see below), whose sum is σ = 2565864. Its totient is φ = 2443600.

The previous prime is 2504717. The next prime is 2504737. The reversal of 2504731 is 1374052.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2504731 - 2⁷ = 2504603 is a prime.

It is a super-2 number, since 2×2504731² = 12547354764722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2504737) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30505 + ... + 30586.

It is an arithmetic number, because the mean of its divisors is an integer number (641466).

2^2504731 is an apocalyptic number.

2504731 is a deficient number, since it is larger than the sum of its proper divisors (61133).

2504731 is an equidigital number, since it uses as much as digits as its factorization.

2504731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61132.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 2504731 is about 1582.6341965217. The cubic root of 2504731 is about 135.8064396136.

Adding to 2504731 its reverse (1374052), we get a palindrome (3878783).

The spelling of 2504731 in words is "two million, five hundred four thousand, seven hundred thirty-one".