25665441 has 8 divisors (see below), whose sum is σ = 34654080. Its totient is φ = 16893552.

The previous prime is 25665433. The next prime is 25665463. The reversal of 25665441 is 14456652.

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

It is not a de Polignac number, because 25665441 - 2³ = 25665433 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (25665421) 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, 53910 + ... + 54383.

It is an arithmetic number, because the mean of its divisors is an integer number (4331760).

Almost surely, 2^25665441 is an apocalyptic number.

It is an amenable number.

25665441 is a deficient number, since it is larger than the sum of its proper divisors (8988639).

25665441 is a wasteful number, since it uses less digits than its factorization.

25665441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108375.

The product of its digits is 28800, while the sum is 33.

The square root of 25665441 is about 5066.1070853270. The cubic root of 25665441 is about 294.9734381907.

It can be divided in two parts, 25665 and 441, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 25665441 in words is "twenty-five million, six hundred sixty-five thousand, four hundred forty-one".