25042840 has 32 divisors (see below), whose sum is σ = 56609280. Its totient is φ = 9970432.

The previous prime is 25042789. The next prime is 25042873. The reversal of 25042840 is 4824052.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7977 + ... + 10663.

It is an arithmetic number, because the mean of its divisors is an integer number (1769040).

Almost surely, 2^25042840 is an apocalyptic number.

25042840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25042840 is an abundant number, since it is smaller than the sum of its proper divisors (31566440).

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

25042840 is a wasteful number, since it uses less digits than its factorization.

25042840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931 (or 2927 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

The square root of 25042840 is about 5004.2821663052. The cubic root of 25042840 is about 292.5686984034.

Adding to 25042840 its reverse (4824052), we get a palindrome (29866892).

The spelling of 25042840 in words is "twenty-five million, forty-two thousand, eight hundred forty".