2575649 has 4 divisors (see below), whose sum is σ = 2579136. Its totient is φ = 2572164.

The previous prime is 2575633. The next prime is 2575663. The reversal of 2575649 is 9465752.

It is a happy number.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2575649 - 2⁴ = 2575633 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2575679) 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, 149 + ... + 2274.

It is an arithmetic number, because the mean of its divisors is an integer number (644784).

2^2575649 is an apocalyptic number.

It is an amenable number.

2575649 is a deficient number, since it is larger than the sum of its proper divisors (3487).

2575649 is a wasteful number, since it uses less digits than its factorization.

2575649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3486.

The product of its digits is 75600, while the sum is 38.

The square root of 2575649 is about 1604.8828617690. The cubic root of 2575649 is about 137.0762535698.

The spelling of 2575649 in words is "two million, five hundred seventy-five thousand, six hundred forty-nine".