2573649 has 12 divisors (see below), whose sum is σ = 4003636. Its totient is φ = 1583712.

The previous prime is 2573633. The next prime is 2573653. The reversal of 2573649 is 9463752.

2573649 is a `hidden beast` number, since 2 + 5 + 7 + 3 + 649 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 986049 + 1587600 = 993^2 + 1260^2 .

It is not a de Polignac number, because 2573649 - 2⁴ = 2573633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2573689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10882 + ... + 11115.

2^2573649 is an apocalyptic number.

It is an amenable number.

2573649 is a deficient number, since it is larger than the sum of its proper divisors (1429987).

2573649 is a wasteful number, since it uses less digits than its factorization.

2573649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22016 (or 22013 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 2573649 is about 1604.2596423273. The cubic root of 2573649 is about 137.0407643270.

The spelling of 2573649 in words is "two million, five hundred seventy-three thousand, six hundred forty-nine".