25261915 has 16 divisors (see below), whose sum is σ = 36683712. Its totient is φ = 16303104.

The previous prime is 25261897. The next prime is 25261919. The reversal of 25261915 is 51916252.

It is a cyclic number.

It is not a de Polignac number, because 25261915 - 2⁹ = 25261403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25261919) 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, 20634 + ... + 21823.

It is an arithmetic number, because the mean of its divisors is an integer number (2292732).

Almost surely, 2^25261915 is an apocalyptic number.

25261915 is a deficient number, since it is larger than the sum of its proper divisors (11421797).

25261915 is a wasteful number, since it uses less digits than its factorization.

25261915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42486.

The product of its digits is 5400, while the sum is 31.

The square root of 25261915 is about 5026.1232575415. The cubic root of 25261915 is about 293.4193539327.

The spelling of 25261915 in words is "twenty-five million, two hundred sixty-one thousand, nine hundred fifteen".