25297530 has 32 divisors (see below), whose sum is σ = 64286784. Its totient is φ = 6349056.

The previous prime is 25297507. The next prime is 25297619. The reversal of 25297530 is 3579252.

It is a junction number, because it is equal to n+sod(n) for n = 25297491 and 25297500.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24292 + ... + 25311.

It is an arithmetic number, because the mean of its divisors is an integer number (2008962).

Almost surely, 2^25297530 is an apocalyptic number.

25297530 is an abundant number, since it is smaller than the sum of its proper divisors (38989254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25297530 is a wasteful number, since it uses less digits than its factorization.

25297530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49630.

The product of its (nonzero) digits is 18900, while the sum is 33.

The square root of 25297530 is about 5029.6649987847. The cubic root of 25297530 is about 293.5571796302.

The spelling of 25297530 in words is "twenty-five million, two hundred ninety-seven thousand, five hundred thirty".