2575661 has 8 divisors (see below), whose sum is σ = 2878848. Its totient is φ = 2284000.

The previous prime is 2575633. The next prime is 2575663. The reversal of 2575661 is 1665752.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2575661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2575663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2405 + ... + 3306.

It is an arithmetic number, because the mean of its divisors is an integer number (359856).

2^2575661 is an apocalyptic number.

It is an amenable number.

2575661 is a deficient number, since it is larger than the sum of its proper divisors (303187).

2575661 is a wasteful number, since it uses less digits than its factorization.

2575661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5763.

The product of its digits is 12600, while the sum is 32.

The square root of 2575661 is about 1604.8866003553. The cubic root of 2575661 is about 137.0764664498.

Subtracting from 2575661 its reverse (1665752), we obtain a palindrome (909909).

The spelling of 2575661 in words is "two million, five hundred seventy-five thousand, six hundred sixty-one".