25530725 has 24 divisors (see below), whose sum is σ = 34765632. Its totient is φ = 18444800.

The previous prime is 25530709. The next prime is 25530733. The reversal of 25530725 is 52703552.

It is not a de Polignac number, because 25530725 - 2⁴ = 25530709 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent 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 23 ways as a sum of consecutive naturals, for example, 72149 + ... + 72501.

It is an arithmetic number, because the mean of its divisors is an integer number (1448568).

Almost surely, 2^25530725 is an apocalyptic number.

25530725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

25530725 is a deficient number, since it is larger than the sum of its proper divisors (9234907).

25530725 is a wasteful number, since it uses less digits than its factorization.

25530725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 632 counting only the distinct ones).

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 25530725 is about 5052.7937816618. The cubic root of 25530725 is about 294.4564346475.

The spelling of 25530725 in words is "twenty-five million, five hundred thirty thousand, seven hundred twenty-five".