25015489 has 2 divisors, whose sum is σ = 25015490. Its totient is φ = 25015488.

The previous prime is 25015451. The next prime is 25015493. The reversal of 25015489 is 98451052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20250000 + 4765489 = 4500^2 + 2183^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25015489 is a prime.

It is not a weakly prime, because it can be changed into another prime (25015409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12507744 + 12507745.

It is an arithmetic number, because the mean of its divisors is an integer number (12507745).

Almost surely, 2^25015489 is an apocalyptic number.

It is an amenable number.

25015489 is a deficient number, since it is larger than the sum of its proper divisors (1).

25015489 is an equidigital number, since it uses as much as digits as its factorization.

25015489 is an evil number, because the sum of its binary digits is even.

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

The square root of 25015489 is about 5001.5486601652. The cubic root of 25015489 is about 292.4621481688.

The spelling of 25015489 in words is "twenty-five million, fifteen thousand, four hundred eighty-nine".