25117212 has 12 divisors (see below), whose sum is σ = 58606856. Its totient is φ = 8372400.

The previous prime is 25117207. The next prime is 25117217. The reversal of 25117212 is 21271152.

It is an interprime number because it is at equal distance from previous prime (25117207) and next prime (25117217).

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (21) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25117217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1046539 + ... + 1046562.

Almost surely, 2^25117212 is an apocalyptic number.

It is an amenable number.

25117212 is an abundant number, since it is smaller than the sum of its proper divisors (33489644).

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

25117212 is a wasteful number, since it uses less digits than its factorization.

25117212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2093108 (or 2093106 counting only the distinct ones).

The product of its digits is 280, while the sum is 21.

The square root of 25117212 is about 5011.7074934597. The cubic root of 25117212 is about 292.8580347952.

Adding to 25117212 its reverse (21271152), we get a palindrome (46388364).

The spelling of 25117212 in words is "twenty-five million, one hundred seventeen thousand, two hundred twelve".