25042240 has 56 divisors (see below), whose sum is σ = 60167520. Its totient is φ = 9927168.

The previous prime is 25042223. The next prime is 25042249. The reversal of 25042240 is 4224052.

It is a super-2 number, since 2×25042240² = 1254227568435200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25042249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44199 + ... + 44761.

It is an arithmetic number, because the mean of its divisors is an integer number (1074420).

Almost surely, 2^25042240 is an apocalyptic number.

25042240 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 25042240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30083760).

25042240 is an abundant number, since it is smaller than the sum of its proper divisors (35125280).

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

25042240 is a wasteful number, since it uses less digits than its factorization.

25042240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 25042240 is about 5004.2222172881. Note that the first 4 decimals coincide. The cubic root of 25042240 is about 292.5663618391.

Adding to 25042240 its reverse (4224052), we get a palindrome (29266292).

The spelling of 25042240 in words is "twenty-five million, forty-two thousand, two hundred forty".