25591361 has 2 divisors, whose sum is σ = 25591362. Its totient is φ = 25591360.

The previous prime is 25591333. The next prime is 25591381. The reversal of 25591361 is 16319552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25000000 + 591361 = 5000^2 + 769^2 .

It is a cyclic number.

It is not a de Polignac number, because 25591361 - 2¹⁰ = 25590337 is a prime.

It is not a weakly prime, because it can be changed into another prime (25591301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12795680 + 12795681.

It is an arithmetic number, because the mean of its divisors is an integer number (12795681).

Almost surely, 2^25591361 is an apocalyptic number.

It is an amenable number.

25591361 is a deficient number, since it is larger than the sum of its proper divisors (1).

25591361 is an equidigital number, since it uses as much as digits as its factorization.

25591361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8100, while the sum is 32.

The square root of 25591361 is about 5058.7904680862. The cubic root of 25591361 is about 294.6893637154.

It can be divided in two parts, 25591 and 361, that added together give a palindrome (25952).

The spelling of 25591361 in words is "twenty-five million, five hundred ninety-one thousand, three hundred sixty-one".