2575621 has 4 divisors (see below), whose sum is σ = 2711200. Its totient is φ = 2440044.

The previous prime is 2575589. The next prime is 2575627. The reversal of 2575621 is 1265752.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2575621 - 2⁵ = 2575589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2575621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2575627) 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, 67761 + ... + 67798.

It is an arithmetic number, because the mean of its divisors is an integer number (677800).

2^2575621 is an apocalyptic number.

It is an amenable number.

2575621 is a deficient number, since it is larger than the sum of its proper divisors (135579).

2575621 is a wasteful number, since it uses less digits than its factorization.

2575621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135578.

The product of its digits is 4200, while the sum is 28.

The square root of 2575621 is about 1604.8741383672. The cubic root of 2575621 is about 137.0757568472.

The spelling of 2575621 in words is "two million, five hundred seventy-five thousand, six hundred twenty-one".