25017240 has 64 divisors (see below), whose sum is σ = 75571200. Its totient is φ = 6625152.

The previous prime is 25017229. The next prime is 25017241. The reversal of 25017240 is 4271052.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25017241) 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, 18921 + ... + 20199.

It is an arithmetic number, because the mean of its divisors is an integer number (1180800).

Almost surely, 2^25017240 is an apocalyptic number.

25017240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25017240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37785600).

25017240 is an abundant number, since it is smaller than the sum of its proper divisors (50553960).

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

25017240 is a wasteful number, since it uses less digits than its factorization.

25017240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456 (or 1452 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 25017240 is about 5001.7237028848. The cubic root of 25017240 is about 292.4689717982.

Adding to 25017240 its reverse (4271052), we get a palindrome (29288292).

The spelling of 25017240 in words is "twenty-five million, seventeen thousand, two hundred forty".