25642461 has 8 divisors (see below), whose sum is σ = 36820000. Its totient is φ = 15779952.

The previous prime is 25642459. The next prime is 25642469. The reversal of 25642461 is 16424652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25642461 - 2¹ = 25642459 is a prime.

It is a super-2 number, since 2×25642461² = 1315071612273042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25642469) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328711 + ... + 328788.

It is an arithmetic number, because the mean of its divisors is an integer number (4602500).

Almost surely, 2^25642461 is an apocalyptic number.

It is an amenable number.

25642461 is a deficient number, since it is larger than the sum of its proper divisors (11177539).

25642461 is a wasteful number, since it uses less digits than its factorization.

25642461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657515.

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

The square root of 25642461 is about 5063.8385637775. The cubic root of 25642461 is about 294.8853753659.

The spelling of 25642461 in words is "twenty-five million, six hundred forty-two thousand, four hundred sixty-one".