2604651 has 16 divisors (see below), whose sum is σ = 4098048. Its totient is φ = 1440000.

The previous prime is 2604647. The next prime is 2604661. The reversal of 2604651 is 1564062.

It is not a de Polignac number, because 2604651 - 2² = 2604647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2604601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1350 + ... + 2651.

It is an arithmetic number, because the mean of its divisors is an integer number (256128).

2^2604651 is an apocalyptic number.

2604651 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2604651 is a deficient number, since it is larger than the sum of its proper divisors (1493397).

2604651 is a wasteful number, since it uses less digits than its factorization.

2604651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4042.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 2604651 is about 1613.8931191377. The cubic root of 2604651 is about 137.5888307535.

It can be divided in two parts, 2604 and 651, that multiplied together give a square (1695204 = 1302²).

The spelling of 2604651 in words is "two million, six hundred four thousand, six hundred fifty-one".