25298521 has 2 divisors, whose sum is σ = 25298522. Its totient is φ = 25298520.

The previous prime is 25298513. The next prime is 25298579. The reversal of 25298521 is 12589252.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24552025 + 746496 = 4955^2 + 864^2 .

It is a cyclic number.

It is not a de Polignac number, because 25298521 - 2³ = 25298513 is a prime.

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 (25298501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12649260 + 12649261.

It is an arithmetic number, because the mean of its divisors is an integer number (12649261).

Almost surely, 2^25298521 is an apocalyptic number.

It is an amenable number.

25298521 is a deficient number, since it is larger than the sum of its proper divisors (1).

25298521 is an equidigital number, since it uses as much as digits as its factorization.

25298521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 34.

The square root of 25298521 is about 5029.7635133274. The cubic root of 25298521 is about 293.5610128288.

The spelling of 25298521 in words is "twenty-five million, two hundred ninety-eight thousand, five hundred twenty-one".