2604531 has 4 divisors (see below), whose sum is σ = 3472712. Its totient is φ = 1736352.

The previous prime is 2604529. The next prime is 2604557. The reversal of 2604531 is 1354062.

It is a happy number.

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

It is not a de Polignac number, because 2604531 - 2¹ = 2604529 is a prime.

It is a super-2 number, since 2×2604531² = 13567163459922, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

2604531 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2604498 and 2604507.

It is not an unprimeable number, because it can be changed into a prime (2604521) 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, 434086 + ... + 434091.

It is an arithmetic number, because the mean of its divisors is an integer number (868178).

2^2604531 is an apocalyptic number.

2604531 is a deficient number, since it is larger than the sum of its proper divisors (868181).

2604531 is an equidigital number, since it uses as much as digits as its factorization.

2604531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 868180.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 2604531 is about 1613.8559415264. The cubic root of 2604531 is about 137.5867177496.

Adding to 2604531 its reverse (1354062), we get a palindrome (3958593).

The spelling of 2604531 in words is "two million, six hundred four thousand, five hundred thirty-one".