25117312 has 32 divisors (see below), whose sum is σ = 54590400. Its totient is φ = 11416320.

The previous prime is 25117249. The next prime is 25117327. The reversal of 25117312 is 21371152.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (22).

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 3 ways as a sum of consecutive naturals, for example, 7512 + ... + 10327.

It is an arithmetic number, because the mean of its divisors is an integer number (1705950).

Almost surely, 2^25117312 is an apocalyptic number.

25117312 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25117312 is an abundant number, since it is smaller than the sum of its proper divisors (29473088).

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

25117312 is a wasteful number, since it uses less digits than its factorization.

25117312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17864 (or 17852 counting only the distinct ones).

The product of its digits is 420, while the sum is 22.

The square root of 25117312 is about 5011.7174700895. The cubic root of 25117312 is about 292.8584234498.

Adding to 25117312 its reverse (21371152), we get a palindrome (46488464).

The spelling of 25117312 in words is "twenty-five million, one hundred seventeen thousand, three hundred twelve".