25602140 has 12 divisors (see below), whose sum is σ = 53764536. Its totient is φ = 10240848.

The previous prime is 25602131. The next prime is 25602167. The reversal of 25602140 is 4120652.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1280107 = 25602140 / (2 + 5 + 6 + 0 + 2 + 1 + 4 + 0).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 640034 + ... + 640073.

It is an arithmetic number, because the mean of its divisors is an integer number (4480378).

Almost surely, 2^25602140 is an apocalyptic number.

25602140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25602140 is an abundant number, since it is smaller than the sum of its proper divisors (28162396).

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

25602140 is a wasteful number, since it uses less digits than its factorization.

25602140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1280116 (or 1280114 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 25602140 is about 5059.8557291686. The cubic root of 25602140 is about 294.7307319826.

Adding to 25602140 its reverse (4120652), we get a palindrome (29722792).

The spelling of 25602140 in words is "twenty-five million, six hundred two thousand, one hundred forty".