25117530 has 32 divisors (see below), whose sum is σ = 60480000. Its totient is φ = 6676032.

The previous prime is 25117513. The next prime is 25117537. The reversal of 25117530 is 3571152.

It is a self number, because there is not a number n which added to its sum of digits gives 25117530.

It is not an unprimeable number, because it can be changed into a prime (25117537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9271 + ... + 11669.

It is an arithmetic number, because the mean of its divisors is an integer number (1890000).

Almost surely, 2^25117530 is an apocalyptic number.

25117530 is an abundant number, since it is smaller than the sum of its proper divisors (35362470).

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

25117530 is a wasteful number, since it uses less digits than its factorization.

25117530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2758.

The product of its (nonzero) digits is 1050, while the sum is 24.

The square root of 25117530 is about 5011.7392190736. The cubic root of 25117530 is about 292.8592707134.

Adding to 25117530 its reverse (3571152), we get a palindrome (28688682).

The spelling of 25117530 in words is "twenty-five million, one hundred seventeen thousand, five hundred thirty".