25990625 has 12 divisors (see below), whose sum is σ = 32490108. Its totient is φ = 20790000.

The previous prime is 25990609. The next prime is 25990631. The reversal of 25990625 is 52609952.

It can be written as a sum of positive squares in 6 ways, for example, as 13719616 + 12271009 = 3704^2 + 3503^2 .

It is a sliding number, since 25990625 = 390625 + 25600000 and 1/390625 + 1/25600000 = 0.0000025990625.

It is not a de Polignac number, because 25990625 - 2⁴ = 25990609 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1034 + ... + 7283.

It is an arithmetic number, because the mean of its divisors is an integer number (2707509).

Almost surely, 2^25990625 is an apocalyptic number.

25990625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25990625 is a deficient number, since it is larger than the sum of its proper divisors (6499483).

25990625 is an frugal number, since it uses more digits than its factorization.

25990625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8342 (or 8322 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 38.

The square root of 25990625 is about 5098.1001363253. The cubic root of 25990625 is about 296.2139956363.

The spelling of 25990625 in words is "twenty-five million, nine hundred ninety thousand, six hundred twenty-five".