2561715 has 48 divisors (see below), whose sum is σ = 4979520. Its totient is φ = 1209600.

The previous prime is 2561683. The next prime is 2561723. The reversal of 2561715 is 5171652.

It is not a de Polignac number, because 2561715 - 2⁵ = 2561683 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16890 + ... + 17040.

It is an arithmetic number, because the mean of its divisors is an integer number (103740).

2^2561715 is an apocalyptic number.

2561715 is a deficient number, since it is larger than the sum of its proper divisors (2417805).

2561715 is a wasteful number, since it uses less digits than its factorization.

2561715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 201 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 2561715 is about 1600.5358477710. The cubic root of 2561715 is about 136.8286169229.

The spelling of 2561715 in words is "two million, five hundred sixty-one thousand, seven hundred fifteen".