25640130 has 32 divisors (see below), whose sum is σ = 62549568. Its totient is φ = 6724800.

The previous prime is 25640081. The next prime is 25640171. The reversal of 25640130 is 3104652.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25640097 and 25640106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5176 + ... + 8835.

It is an arithmetic number, because the mean of its divisors is an integer number (1954674).

Almost surely, 2^25640130 is an apocalyptic number.

25640130 is an abundant number, since it is smaller than the sum of its proper divisors (36909438).

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

25640130 is a wasteful number, since it uses less digits than its factorization.

25640130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14082.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 25640130 is about 5063.6083971808. The cubic root of 25640130 is about 294.8764396838.

Adding to 25640130 its reverse (3104652), we get a palindrome (28744782).

The spelling of 25640130 in words is "twenty-five million, six hundred forty thousand, one hundred thirty".