2565021 has 8 divisors (see below), whose sum is σ = 3538080. Its totient is φ = 1650992.

The previous prime is 2565007. The next prime is 2565023. The reversal of 2565021 is 1205652.

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

It is a cyclic number.

It is not a de Polignac number, because 2565021 - 2⁶ = 2564957 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565023) 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, 14655 + ... + 14828.

It is an arithmetic number, because the mean of its divisors is an integer number (442260).

2^2565021 is an apocalyptic number.

It is an amenable number.

2565021 is a deficient number, since it is larger than the sum of its proper divisors (973059).

2565021 is a wasteful number, since it uses less digits than its factorization.

2565021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29515.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 2565021 is about 1601.5682938920. The cubic root of 2565021 is about 136.8874526316.

The spelling of 2565021 in words is "two million, five hundred sixty-five thousand, twenty-one".