25280530 has 48 divisors (see below), whose sum is σ = 53003160. Its totient is φ = 8645120.

The previous prime is 25280527. The next prime is 25280533. The reversal of 25280530 is 3508252.

It is an interprime number because it is at equal distance from previous prime (25280527) and next prime (25280533).

It can be written as a sum of positive squares in 4 ways, for example, as 25270729 + 9801 = 5027^2 + 99^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25280495 and 25280504.

It is not an unprimeable number, because it can be changed into a prime (25280533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19956 + ... + 21184.

Almost surely, 2^25280530 is an apocalyptic number.

25280530 is an abundant number, since it is smaller than the sum of its proper divisors (27722630).

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

25280530 is a wasteful number, since it uses less digits than its factorization.

25280530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1275 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25280530 is about 5027.9747413844. The cubic root of 25280530 is about 293.4914078554.

Adding to 25280530 its reverse (3508252), we get a palindrome (28788782).

The spelling of 25280530 in words is "twenty-five million, two hundred eighty thousand, five hundred thirty".