25290025 has 6 divisors (see below), whose sum is σ = 31359662. Its totient is φ = 20232000.

The previous prime is 25290019. The next prime is 25290043. The reversal of 25290025 is 52009252.

It can be written as a sum of positive squares in 3 ways, for example, as 817216 + 24472809 = 904^2 + 4947^2 .

It is not a de Polignac number, because 25290025 - 2⁵ = 25289993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 1011601 = 25290025 / (2 + 5 + 2 + 9 + 0 + 0 + 2 + 5).

It is a Duffinian number.

It is an unprimeable number.

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 in 5 ways as a sum of consecutive naturals, for example, 505776 + ... + 505825.

Almost surely, 2^25290025 is an apocalyptic number.

25290025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25290025 is a deficient number, since it is larger than the sum of its proper divisors (6069637).

25290025 is a wasteful number, since it uses less digits than its factorization.

25290025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011611 (or 1011606 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 25290025 is about 5028.9188698964. The cubic root of 25290025 is about 293.5281469600.

Adding to 25290025 its reverse (52009252), we get a palindrome (77299277).

The spelling of 25290025 in words is "twenty-five million, two hundred ninety thousand, twenty-five".