25920269 has 2 divisors, whose sum is σ = 25920270. Its totient is φ = 25920268.

The previous prime is 25920221. The next prime is 25920289. The reversal of 25920269 is 96202952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25300900 + 619369 = 5030^2 + 787^2 .

It is a cyclic number.

It is not a de Polignac number, because 25920269 - 2¹² = 25916173 is a prime.

It is a super-2 number, since 2×25920269² = 1343720690064722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25920289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12960134 + 12960135.

It is an arithmetic number, because the mean of its divisors is an integer number (12960135).

Almost surely, 2^25920269 is an apocalyptic number.

It is an amenable number.

25920269 is a deficient number, since it is larger than the sum of its proper divisors (1).

25920269 is an equidigital number, since it uses as much as digits as its factorization.

25920269 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19440, while the sum is 35.

The square root of 25920269 is about 5091.1952427696. The cubic root of 25920269 is about 295.9464726986.

The spelling of 25920269 in words is "twenty-five million, nine hundred twenty thousand, two hundred sixty-nine".