25361261 has 2 divisors, whose sum is σ = 25361262. Its totient is φ = 25361260.

The previous prime is 25361251. The next prime is 25361267. The reversal of 25361261 is 16216352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21436900 + 3924361 = 4630^2 + 1981^2 .

It is a cyclic number.

It is not a de Polignac number, because 25361261 - 2⁶ = 25361197 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25361261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25361267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12680630 + 12680631.

It is an arithmetic number, because the mean of its divisors is an integer number (12680631).

Almost surely, 2^25361261 is an apocalyptic number.

It is an amenable number.

25361261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25361261 is an equidigital number, since it uses as much as digits as its factorization.

25361261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 26.

The square root of 25361261 is about 5035.9965250187. The cubic root of 25361261 is about 293.8034883133.

The spelling of 25361261 in words is "twenty-five million, three hundred sixty-one thousand, two hundred sixty-one".