25521269 has 2 divisors, whose sum is σ = 25521270. Its totient is φ = 25521268.

The previous prime is 25521259. The next prime is 25521271. The reversal of 25521269 is 96212552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25502500 + 18769 = 5050^2 + 137^2 .

It is a cyclic number.

It is not a de Polignac number, because 25521269 - 2⁴ = 25521253 is a prime.

It is a super-2 number, since 2×25521269² = 1302670342740722, which contains 22 as substring.

Together with 25521271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25521239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12760634 + 12760635.

It is an arithmetic number, because the mean of its divisors is an integer number (12760635).

Almost surely, 2^25521269 is an apocalyptic number.

It is an amenable number.

25521269 is a deficient number, since it is larger than the sum of its proper divisors (1).

25521269 is an equidigital number, since it uses as much as digits as its factorization.

25521269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 32.

The square root of 25521269 is about 5051.8579750424. The cubic root of 25521269 is about 294.4200768358.

The spelling of 25521269 in words is "twenty-five million, five hundred twenty-one thousand, two hundred sixty-nine".