2507649 has 16 divisors (see below), whose sum is σ = 3464064. Its totient is φ = 1612800.

The previous prime is 2507647. The next prime is 2507671. The reversal of 2507649 is 9467052.

It is not a de Polignac number, because 2507649 - 2¹ = 2507647 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2507641) 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, 12897 + ... + 13089.

It is an arithmetic number, because the mean of its divisors is an integer number (216504).

2^2507649 is an apocalyptic number.

It is an amenable number.

2507649 is a deficient number, since it is larger than the sum of its proper divisors (956415).

2507649 is a wasteful number, since it uses less digits than its factorization.

2507649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 2507649 is about 1583.5558089313. Note that the first 3 decimals coincide. The cubic root of 2507649 is about 135.8591571044.

The spelling of 2507649 in words is "two million, five hundred seven thousand, six hundred forty-nine".