31245426 has 48 divisors (see below), whose sum is σ = 70761600. Its totient is φ = 10333008.

The previous prime is 31245421. The next prime is 31245451. The reversal of 31245426 is 62454213.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 31245426.

It is not an unprimeable number, because it can be changed into a prime (31245421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 116020 + ... + 116288.

It is an arithmetic number, because the mean of its divisors is an integer number (1474200).

Almost surely, 2^31245426 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31245426, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

31245426 is an abundant number, since it is smaller than the sum of its proper divisors (39516174).

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

31245426 is a wasteful number, since it uses less digits than its factorization.

31245426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525 (or 513 counting only the distinct ones).

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

The square root of 31245426 is about 5589.7608177810. The cubic root of 31245426 is about 314.9648940469.

Adding to 31245426 its reverse (62454213), we get a palindrome (93699639).

The spelling of 31245426 in words is "thirty-one million, two hundred forty-five thousand, four hundred twenty-six".