25466521 has 2 divisors, whose sum is σ = 25466522. Its totient is φ = 25466520.

The previous prime is 25466513. The next prime is 25466557. The reversal of 25466521 is 12566452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17264025 + 8202496 = 4155^2 + 2864^2 .

It is a cyclic number.

It is not a de Polignac number, because 25466521 - 2³ = 25466513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25466921) 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, 12733260 + 12733261.

It is an arithmetic number, because the mean of its divisors is an integer number (12733261).

Almost surely, 2^25466521 is an apocalyptic number.

It is an amenable number.

25466521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25466521 is an equidigital number, since it uses as much as digits as its factorization.

25466521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 25466521 is about 5046.4364654675. The cubic root of 25466521 is about 294.2093970015.

The spelling of 25466521 in words is "twenty-five million, four hundred sixty-six thousand, five hundred twenty-one".