25431112 has 32 divisors (see below), whose sum is σ = 55036800. Its totient is φ = 10790784.

The previous prime is 25431073. The next prime is 25431151. The reversal of 25431112 is 21113452.

It is an interprime number because it is at equal distance from previous prime (25431073) and next prime (25431151).

It is a self number, because there is not a number n which added to its sum of digits gives 25431112.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 3564 + ... + 7972.

It is an arithmetic number, because the mean of its divisors is an integer number (1719900).

Almost surely, 2^25431112 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 25431112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27518400).

25431112 is an abundant number, since it is smaller than the sum of its proper divisors (29605688).

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

25431112 is a wasteful number, since it uses less digits than its factorization.

25431112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4525 (or 4521 counting only the distinct ones).

The product of its digits is 240, while the sum is 19.

The square root of 25431112 is about 5042.9269278862. The cubic root of 25431112 is about 294.0729761616.

Adding to 25431112 its reverse (21113452), we get a palindrome (46544564).

It can be divided in two parts, 2543 and 1112, that added together give a triangular number (3655 = T₈₅).

The spelling of 25431112 in words is "twenty-five million, four hundred thirty-one thousand, one hundred twelve".