2566491 has 8 divisors (see below), whose sum is σ = 3432960. Its totient is φ = 1705512.

The previous prime is 2566489. The next prime is 2566513. The reversal of 2566491 is 1946652.

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

It is not a de Polignac number, because 2566491 - 2¹ = 2566489 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566411) 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, 115 + ... + 2268.

It is an arithmetic number, because the mean of its divisors is an integer number (429120).

2^2566491 is an apocalyptic number.

2566491 is a deficient number, since it is larger than the sum of its proper divisors (866469).

2566491 is a wasteful number, since it uses less digits than its factorization.

2566491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2745.

The product of its digits is 12960, while the sum is 33.

The square root of 2566491 is about 1602.0271533279. The cubic root of 2566491 is about 136.9135974633.

The spelling of 2566491 in words is "two million, five hundred sixty-six thousand, four hundred ninety-one".