25501369 has 2 divisors, whose sum is σ = 25501370. Its totient is φ = 25501368.

The previous prime is 25501361. The next prime is 25501381. The reversal of 25501369 is 96310552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20142144 + 5359225 = 4488^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 25501369 - 2³ = 25501361 is a prime.

It is a super-2 number, since 2×25501369² = 1300639641748322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25501369.

It is not a weakly prime, because it can be changed into another prime (25501361) 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, 12750684 + 12750685.

It is an arithmetic number, because the mean of its divisors is an integer number (12750685).

Almost surely, 2^25501369 is an apocalyptic number.

It is an amenable number.

25501369 is a deficient number, since it is larger than the sum of its proper divisors (1).

25501369 is an equidigital number, since it uses as much as digits as its factorization.

25501369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 25501369 is about 5049.8880185604. Note that the first 3 decimals coincide. The cubic root of 25501369 is about 294.3435330582.

The spelling of 25501369 in words is "twenty-five million, five hundred one thousand, three hundred sixty-nine".