25881401 has 16 divisors (see below), whose sum is σ = 33532800. Its totient is φ = 19398528.

The previous prime is 25881379. The next prime is 25881403. The reversal of 25881401 is 10418852.

It is a cyclic number.

It is not a de Polignac number, because 25881401 - 2¹⁴ = 25865017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25881403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5756 + ... + 9213.

It is an arithmetic number, because the mean of its divisors is an integer number (2095800).

Almost surely, 2^25881401 is an apocalyptic number.

It is an amenable number.

25881401 is a deficient number, since it is larger than the sum of its proper divisors (7651399).

25881401 is a wasteful number, since it uses less digits than its factorization.

25881401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15008.

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 25881401 is about 5087.3766324109. The cubic root of 25881401 is about 295.7984726671.

The spelling of 25881401 in words is "twenty-five million, eight hundred eighty-one thousand, four hundred one".