25951081 has 4 divisors (see below), whose sum is σ = 27947332. Its totient is φ = 23954832.

The previous prime is 25951063. The next prime is 25951111. The reversal of 25951081 is 18015952.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9272025 + 16679056 = 3045^2 + 4084^2 .

It is a cyclic number.

It is not a de Polignac number, because 25951081 - 2⁵ = 25951049 is a prime.

It is a super-2 number, since 2×25951081² = 1346917210137122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25951021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 998106 + ... + 998131.

It is an arithmetic number, because the mean of its divisors is an integer number (6986833).

Almost surely, 2^25951081 is an apocalyptic number.

It is an amenable number.

25951081 is a deficient number, since it is larger than the sum of its proper divisors (1996251).

25951081 is a wasteful number, since it uses less digits than its factorization.

25951081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1996250.

The product of its (nonzero) digits is 3600, while the sum is 31.

The square root of 25951081 is about 5094.2203525172. The cubic root of 25951081 is about 296.0636923141.

The spelling of 25951081 in words is "twenty-five million, nine hundred fifty-one thousand, eighty-one".