25192261 has 2 divisors, whose sum is σ = 25192262. Its totient is φ = 25192260.

The previous prime is 25192247. The next prime is 25192289. The reversal of 25192261 is 16229152.

It is an a-pointer prime, because the next prime (25192289) can be obtained adding 25192261 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16892100 + 8300161 = 4110^2 + 2881^2 .

It is a cyclic number.

It is not a de Polignac number, because 25192261 - 2⁵ = 25192229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25192241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12596130 + 12596131.

It is an arithmetic number, because the mean of its divisors is an integer number (12596131).

Almost surely, 2^25192261 is an apocalyptic number.

It is an amenable number.

25192261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25192261 is an equidigital number, since it uses as much as digits as its factorization.

25192261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 28.

The square root of 25192261 is about 5019.1892771642. The cubic root of 25192261 is about 293.1494265904.

The spelling of 25192261 in words is "twenty-five million, one hundred ninety-two thousand, two hundred sixty-one".