25742140 has 24 divisors (see below), whose sum is σ = 55923840. Its totient is φ = 9941568.

The previous prime is 25742117. The next prime is 25742149. The reversal of 25742140 is 4124752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25742149) 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, 21612 + ... + 22771.

It is an arithmetic number, because the mean of its divisors is an integer number (2330160).

Almost surely, 2^25742140 is an apocalyptic number.

25742140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25742140 is an abundant number, since it is smaller than the sum of its proper divisors (30181700).

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

25742140 is a wasteful number, since it uses less digits than its factorization.

25742140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44421 (or 44419 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 25742140 is about 5073.6712546242. The cubic root of 25742140 is about 295.2669803676.

Adding to 25742140 its reverse (4124752), we get a palindrome (29866892).

The spelling of 25742140 in words is "twenty-five million, seven hundred forty-two thousand, one hundred forty".