25290361 has 2 divisors, whose sum is σ = 25290362. Its totient is φ = 25290360.

The previous prime is 25290359. The next prime is 25290367. The reversal of 25290361 is 16309252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15405625 + 9884736 = 3925^2 + 3144^2 .

It is a cyclic number.

It is not a de Polignac number, because 25290361 - 2¹ = 25290359 is a prime.

Together with 25290359, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (25290367) 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, 12645180 + 12645181.

It is an arithmetic number, because the mean of its divisors is an integer number (12645181).

Almost surely, 2^25290361 is an apocalyptic number.

It is an amenable number.

25290361 is a deficient number, since it is larger than the sum of its proper divisors (1).

25290361 is an equidigital number, since it uses as much as digits as its factorization.

25290361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 25290361 is about 5028.9522765682. The cubic root of 25290361 is about 293.5294468799.

It can be divided in two parts, 25290 and 361, that added together give a triangular number (25651 = T₂₂₆).

The spelling of 25290361 in words is "twenty-five million, two hundred ninety thousand, three hundred sixty-one".