2597561 has 4 divisors (see below), whose sum is σ = 2609232. Its totient is φ = 2585892.

The previous prime is 2597537. The next prime is 2597591. The reversal of 2597561 is 1657952.

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 2597561 - 2¹⁴ = 2581177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2597591) 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, 5495 + ... + 5948.

It is an arithmetic number, because the mean of its divisors is an integer number (652308).

2^2597561 is an apocalyptic number.

It is an amenable number.

2597561 is a deficient number, since it is larger than the sum of its proper divisors (11671).

2597561 is a wasteful number, since it uses less digits than its factorization.

2597561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11670.

The product of its digits is 18900, while the sum is 35.

The square root of 2597561 is about 1611.6950704150. The cubic root of 2597561 is about 137.4638759097.

The spelling of 2597561 in words is "two million, five hundred ninety-seven thousand, five hundred sixty-one".