25142840 has 32 divisors (see below), whose sum is σ = 57954960. Its totient is φ = 9811200.

The previous prime is 25142809. The next prime is 25142849. The reversal of 25142840 is 4824152.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25142849) 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, 6026 + ... + 9305.

Almost surely, 2^25142840 is an apocalyptic number.

25142840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25142840 is an abundant number, since it is smaller than the sum of its proper divisors (32812120).

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

25142840 is a wasteful number, since it uses less digits than its factorization.

25142840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15383 (or 15379 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 25142840 is about 5014.2636548151. The cubic root of 25142840 is about 292.9576054866.

Adding to 25142840 its reverse (4824152), we get a palindrome (29966992).

The spelling of 25142840 in words is "twenty-five million, one hundred forty-two thousand, eight hundred forty".