25217472 has 112 divisors (see below), whose sum is σ = 79004160. Its totient is φ = 6945792.

The previous prime is 25217447. The next prime is 25217473. The reversal of 25217472 is 27471252.

It is a tau number, because it is divible by the number of its divisors (112).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25217473) 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, 38653 + ... + 39299.

Almost surely, 2^25217472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25217472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39502080).

25217472 is an abundant number, since it is smaller than the sum of its proper divisors (53786688).

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

25217472 is a wasteful number, since it uses less digits than its factorization.

25217472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698 (or 688 counting only the distinct ones).

The product of its digits is 7840, while the sum is 30.

The square root of 25217472 is about 5021.7001105203. The cubic root of 25217472 is about 293.2471831488.

The spelling of 25217472 in words is "twenty-five million, two hundred seventeen thousand, four hundred seventy-two".