2561442 has 16 divisors (see below), whose sum is σ = 5517120. Its totient is φ = 788112.

The previous prime is 2561431. The next prime is 2561491. The reversal of 2561442 is 2441652.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16342 + ... + 16497.

It is an arithmetic number, because the mean of its divisors is an integer number (344820).

2^2561442 is an apocalyptic number.

2561442 is an abundant number, since it is smaller than the sum of its proper divisors (2955678).

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

2561442 is a wasteful number, since it uses less digits than its factorization.

2561442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32857.

The product of its digits is 1920, while the sum is 24.

The square root of 2561442 is about 1600.4505615607. The cubic root of 2561442 is about 136.8237561767.

It can be divided in two parts, 2561 and 442, that added together give a palindrome (3003).

The spelling of 2561442 in words is "two million, five hundred sixty-one thousand, four hundred forty-two".