2564442 has 12 divisors (see below), whose sum is σ = 5556330. Its totient is φ = 854808.

The previous prime is 2564423. The next prime is 2564447. The reversal of 2564442 is 2444652.

It can be written as a sum of positive squares in only one way, i.e., 2313441 + 251001 = 1521^2 + 501^2 .

It is not an unprimeable number, because it can be changed into a prime (2564447) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71217 + ... + 71252.

2^2564442 is an apocalyptic number.

2564442 is an abundant number, since it is smaller than the sum of its proper divisors (2991888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2564442 is a wasteful number, since it uses less digits than its factorization.

2564442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142477 (or 142474 counting only the distinct ones).

The product of its digits is 7680, while the sum is 27.

The square root of 2564442 is about 1601.3875233684. The cubic root of 2564442 is about 136.8771520272.

The spelling of 2564442 in words is "two million, five hundred sixty-four thousand, four hundred forty-two".