25431426 has 12 divisors (see below), whose sum is σ = 55101462. Its totient is φ = 8477136.

The previous prime is 25431407. The next prime is 25431431. The reversal of 25431426 is 62413452.

It can be written as a sum of positive squares in only one way, i.e., 17015625 + 8415801 = 4125^2 + 2901^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25431426.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 706411 + ... + 706446.

Almost surely, 2^25431426 is an apocalyptic number.

25431426 is an abundant number, since it is smaller than the sum of its proper divisors (29670036).

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

25431426 is a wasteful number, since it uses less digits than its factorization.

25431426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1412865 (or 1412862 counting only the distinct ones).

The product of its digits is 5760, while the sum is 27.

The square root of 25431426 is about 5042.9580605038. The cubic root of 25431426 is about 294.0741864709.

Adding to 25431426 its reverse (62413452), we get a palindrome (87844878).

It can be divided in two parts, 2543 and 1426, that added together give a square (3969 = 63²).

The spelling of 25431426 in words is "twenty-five million, four hundred thirty-one thousand, four hundred twenty-six".