25424540 has 12 divisors (see below), whose sum is σ = 53391576. Its totient is φ = 10169808.

The previous prime is 25424533. The next prime is 25424593. The reversal of 25424540 is 4542452.

It is a congruent number.

It is an unprimeable number.

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, 635594 + ... + 635633.

It is an arithmetic number, because the mean of its divisors is an integer number (4449298).

Almost surely, 2^25424540 is an apocalyptic number.

25424540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25424540 is an abundant number, since it is smaller than the sum of its proper divisors (27967036).

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

25424540 is a wasteful number, since it uses less digits than its factorization.

25424540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271236 (or 1271234 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 25424540 is about 5042.2752800695. The cubic root of 25424540 is about 294.0476421782.

Adding to 25424540 its reverse (4542452), we get a palindrome (29966992).

The spelling of 25424540 in words is "twenty-five million, four hundred twenty-four thousand, five hundred forty".