2600649 has 12 divisors (see below), whose sum is σ = 3795012. Its totient is φ = 1716000.

The previous prime is 2600627. The next prime is 2600681. The reversal of 2600649 is 9460062.

It can be written as a sum of positive squares in 2 ways, for example, as 2082249 + 518400 = 1443^2 + 720^2 .

It is not a de Polignac number, because 2600649 - 2⁸ = 2600393 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2608649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 522 + ... + 2339.

It is an arithmetic number, because the mean of its divisors is an integer number (316251).

2^2600649 is an apocalyptic number.

It is an amenable number.

2600649 is a deficient number, since it is larger than the sum of its proper divisors (1194363).

2600649 is a wasteful number, since it uses less digits than its factorization.

2600649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968 (or 2965 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 2600649 is about 1612.6527834596. The cubic root of 2600649 is about 137.5183270337.

It can be divided in two parts, 2600 and 649, that added together give a square (3249 = 57²).

The spelling of 2600649 in words is "two million, six hundred thousand, six hundred forty-nine".