25642261 has 8 divisors (see below), whose sum is σ = 26365248. Its totient is φ = 24924000.

The previous prime is 25642249. The next prime is 25642277. The reversal of 25642261 is 16224652.

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 25642261 - 2¹¹ = 25640213 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 (25642231) 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 7 ways as a sum of consecutive naturals, for example, 11746 + ... + 13756.

It is an arithmetic number, because the mean of its divisors is an integer number (3295656).

Almost surely, 2^25642261 is an apocalyptic number.

It is an amenable number.

25642261 is a deficient number, since it is larger than the sum of its proper divisors (722987).

25642261 is a wasteful number, since it uses less digits than its factorization.

25642261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363.

The product of its digits is 5760, while the sum is 28.

The square root of 25642261 is about 5063.8188158740. The cubic root of 25642261 is about 294.8846087049.

The spelling of 25642261 in words is "twenty-five million, six hundred forty-two thousand, two hundred sixty-one".