25480637 has 36 divisors (see below), whose sum is σ = 34171956. Its totient is φ = 18869760.

The previous prime is 25480633. The next prime is 25480643. The reversal of 25480637 is 73608452.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 7722841 + 17757796 = 2779^2 + 4214^2 .

It is not a de Polignac number, because 25480637 - 2² = 25480633 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25480597 and 25480606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25480633) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 140687 + ... + 140867.

It is an arithmetic number, because the mean of its divisors is an integer number (949221).

Almost surely, 2^25480637 is an apocalyptic number.

It is an amenable number.

25480637 is a deficient number, since it is larger than the sum of its proper divisors (8691319).

25480637 is a wasteful number, since it uses less digits than its factorization.

25480637 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238 (or 218 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 25480637 is about 5047.8348824026. The cubic root of 25480637 is about 294.2637466938.

The spelling of 25480637 in words is "twenty-five million, four hundred eighty thousand, six hundred thirty-seven".