2564189 has 4 divisors (see below), whose sum is σ = 2573724. Its totient is φ = 2554656.

The previous prime is 2564171. The next prime is 2564203. The reversal of 2564189 is 9814652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 284089 + 2280100 = 533^2 + 1510^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564189 - 2⁸ = 2563933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564489) 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, 4352 + ... + 4905.

It is an arithmetic number, because the mean of its divisors is an integer number (643431).

2^2564189 is an apocalyptic number.

It is an amenable number.

2564189 is a deficient number, since it is larger than the sum of its proper divisors (9535).

2564189 is an equidigital number, since it uses as much as digits as its factorization.

2564189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9534.

The product of its digits is 17280, while the sum is 35.

The square root of 2564189 is about 1601.3085274237. The cubic root of 2564189 is about 136.8726505855.

The spelling of 2564189 in words is "two million, five hundred sixty-four thousand, one hundred eighty-nine".