25207261 has 4 divisors (see below), whose sum is σ = 25270524. Its totient is φ = 25144000.

The previous prime is 25207229. The next prime is 25207267. The reversal of 25207261 is 16270252.

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 24810361 + 396900 = 4981^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 25207261 - 2⁵ = 25207229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25207267) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 31030 + ... + 31831.

It is an arithmetic number, because the mean of its divisors is an integer number (6317631).

Almost surely, 2^25207261 is an apocalyptic number.

It is an amenable number.

25207261 is a deficient number, since it is larger than the sum of its proper divisors (63263).

25207261 is an equidigital number, since it uses as much as digits as its factorization.

25207261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63262.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 25207261 is about 5020.6833200273. The cubic root of 25207261 is about 293.2075974833.

The spelling of 25207261 in words is "twenty-five million, two hundred seven thousand, two hundred sixty-one".