25215049 has 2 divisors, whose sum is σ = 25215050. Its totient is φ = 25215048.

The previous prime is 25214999. The next prime is 25215067. The reversal of 25215049 is 94051252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15405625 + 9809424 = 3925^2 + 3132^2 .

It is a cyclic number.

It is not a de Polignac number, because 25215049 - 2⁷ = 25214921 is a prime.

It is not a weakly prime, because it can be changed into another prime (25215089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12607524 + 12607525.

It is an arithmetic number, because the mean of its divisors is an integer number (12607525).

Almost surely, 2^25215049 is an apocalyptic number.

It is an amenable number.

25215049 is a deficient number, since it is larger than the sum of its proper divisors (1).

25215049 is an equidigital number, since it uses as much as digits as its factorization.

25215049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 25215049 is about 5021.4588517681. The cubic root of 25215049 is about 293.2377907101.

The spelling of 25215049 in words is "twenty-five million, two hundred fifteen thousand, forty-nine".