25971015 has 16 divisors (see below), whose sum is σ = 47490048. Its totient is φ = 11872416.

The previous prime is 25970983. The next prime is 25971031. The reversal of 25971015 is 51017952.

It is not a de Polignac number, because 25971015 - 2⁵ = 25970983 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123567 + ... + 123776.

It is an arithmetic number, because the mean of its divisors is an integer number (2968128).

Almost surely, 2^25971015 is an apocalyptic number.

25971015 is a deficient number, since it is larger than the sum of its proper divisors (21519033).

25971015 is a wasteful number, since it uses less digits than its factorization.

25971015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247358.

The product of its (nonzero) digits is 3150, while the sum is 30.

The square root of 25971015 is about 5096.1765079322. The cubic root of 25971015 is about 296.1394787932.

Adding to 25971015 its reverse (51017952), we get a palindrome (76988967).

The spelling of 25971015 in words is "twenty-five million, nine hundred seventy-one thousand, fifteen".