2542665 has 16 divisors (see below), whose sum is σ = 4088448. Its totient is φ = 1349376.

The previous prime is 2542649. The next prime is 2542669. The reversal of 2542665 is 5662452.

It is not a de Polignac number, because 2542665 - 2⁴ = 2542649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2542669) 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, 4804 + ... + 5306.

It is an arithmetic number, because the mean of its divisors is an integer number (255528).

2^2542665 is an apocalyptic number.

It is an amenable number.

2542665 is a deficient number, since it is larger than the sum of its proper divisors (1545783).

2542665 is a wasteful number, since it uses less digits than its factorization.

2542665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 848.

The product of its digits is 14400, while the sum is 30.

The square root of 2542665 is about 1594.5736107186. The cubic root of 2542665 is about 136.4886008004.

The spelling of 2542665 in words is "two million, five hundred forty-two thousand, six hundred sixty-five".