25761181 has 2 divisors, whose sum is σ = 25761182. Its totient is φ = 25761180.

The previous prime is 25761157. The next prime is 25761199. The reversal of 25761181 is 18116752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18844281 + 6916900 = 4341^2 + 2630^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25761181 is a prime.

It is a super-2 number, since 2×25761181² = 1327276893029522, which contains 22 as substring.

It is a nialpdrome in base 12.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25762181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12880590 + 12880591.

It is an arithmetic number, because the mean of its divisors is an integer number (12880591).

Almost surely, 2^25761181 is an apocalyptic number.

It is an amenable number.

25761181 is a deficient number, since it is larger than the sum of its proper divisors (1).

25761181 is an equidigital number, since it uses as much as digits as its factorization.

25761181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3360, while the sum is 31.

The square root of 25761181 is about 5075.5473596451. The cubic root of 25761181 is about 295.3397636578.

The spelling of 25761181 in words is "twenty-five million, seven hundred sixty-one thousand, one hundred eighty-one".