25690971 has 8 divisors (see below), whose sum is σ = 35359744. Its totient is φ = 16574760.

The previous prime is 25690933. The next prime is 25690991. The reversal of 25690971 is 17909652.

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

It is not a de Polignac number, because 25690971 - 2⁷ = 25690843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25690991) 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, 138031 + ... + 138216.

It is an arithmetic number, because the mean of its divisors is an integer number (4419968).

Almost surely, 2^25690971 is an apocalyptic number.

25690971 is a deficient number, since it is larger than the sum of its proper divisors (9668773).

25690971 is a wasteful number, since it uses less digits than its factorization.

25690971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276281.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 25690971 is about 5068.6261452192. The cubic root of 25690971 is about 295.0712113827.

The spelling of 25690971 in words is "twenty-five million, six hundred ninety thousand, nine hundred seventy-one".