25530012 has 48 divisors (see below), whose sum is σ = 66898720. Its totient is φ = 8418816.

The previous prime is 25530007. The next prime is 25530013. The reversal of 25530012 is 21003552.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25530013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9258 + ... + 11694.

Almost surely, 2^25530012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25530012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33449360).

25530012 is an abundant number, since it is smaller than the sum of its proper divisors (41368708).

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

25530012 is a wasteful number, since it uses less digits than its factorization.

25530012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2547 (or 2539 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 25530012 is about 5052.7232261425. The cubic root of 25530012 is about 294.4536935138.

Adding to 25530012 its reverse (21003552), we get a palindrome (46533564).

The spelling of 25530012 in words is "twenty-five million, five hundred thirty thousand, twelve".