25442661 has 16 divisors (see below), whose sum is σ = 35471360. Its totient is φ = 16202160.

The previous prime is 25442639. The next prime is 25442687. The reversal of 25442661 is 16624452.

It is not a de Polignac number, because 25442661 - 2¹³ = 25434469 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 (25442621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5616 + ... + 9078.

It is an arithmetic number, because the mean of its divisors is an integer number (2216960).

Almost surely, 2^25442661 is an apocalyptic number.

It is an amenable number.

25442661 is a deficient number, since it is larger than the sum of its proper divisors (10028699).

25442661 is a wasteful number, since it uses less digits than its factorization.

25442661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3576.

The product of its digits is 11520, while the sum is 30.

The square root of 25442661 is about 5044.0718670534. The cubic root of 25442661 is about 294.1174850925.

The spelling of 25442661 in words is "twenty-five million, four hundred forty-two thousand, six hundred sixty-one".