25665401 has 8 divisors (see below), whose sum is σ = 26841024. Its totient is φ = 24494800.

The previous prime is 25665391. The next prime is 25665403. The reversal of 25665401 is 10456652.

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 25665401 - 2¹⁴ = 25649017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25665403) 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, 12551 + ... + 14451.

It is an arithmetic number, because the mean of its divisors is an integer number (3355128).

Almost surely, 2^25665401 is an apocalyptic number.

It is an amenable number.

25665401 is a deficient number, since it is larger than the sum of its proper divisors (1175623).

25665401 is a wasteful number, since it uses less digits than its factorization.

25665401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 25665401 is about 5066.1031375210. The cubic root of 25665401 is about 294.9732849503.

The spelling of 25665401 in words is "twenty-five million, six hundred sixty-five thousand, four hundred one".