25909081 has 8 divisors (see below), whose sum is σ = 28315584. Its totient is φ = 23511120.

The previous prime is 25909073. The next prime is 25909097. The reversal of 25909081 is 18090952.

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 25909081 - 2³ = 25909073 is a prime.

It is a super-2 number, since 2×25909081² = 1342560956529122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25909001) 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, 5380 + ... + 8986.

It is an arithmetic number, because the mean of its divisors is an integer number (3539448).

Almost surely, 2^25909081 is an apocalyptic number.

It is an amenable number.

25909081 is a deficient number, since it is larger than the sum of its proper divisors (2406503).

25909081 is a wasteful number, since it uses less digits than its factorization.

25909081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4271.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 25909081 is about 5090.0963645102. The cubic root of 25909081 is about 295.9038866483.

The spelling of 25909081 in words is "twenty-five million, nine hundred nine thousand, eighty-one".