25577261 has 2 divisors, whose sum is σ = 25577262. Its totient is φ = 25577260.

The previous prime is 25577213. The next prime is 25577281. The reversal of 25577261 is 16277552.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16152361 + 9424900 = 4019^2 + 3070^2 .

It is a cyclic number.

It is not a de Polignac number, because 25577261 - 2¹⁸ = 25315117 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 (25577281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12788630 + 12788631.

It is an arithmetic number, because the mean of its divisors is an integer number (12788631).

Almost surely, 2^25577261 is an apocalyptic number.

It is an amenable number.

25577261 is a deficient number, since it is larger than the sum of its proper divisors (1).

25577261 is an equidigital number, since it uses as much as digits as its factorization.

25577261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29400, while the sum is 35.

The square root of 25577261 is about 5057.3966623155. The cubic root of 25577261 is about 294.6352323834.

The spelling of 25577261 in words is "twenty-five million, five hundred seventy-seven thousand, two hundred sixty-one".