13112442 has 80 divisors (see below), whose sum is σ = 34755072. Its totient is φ = 3615840.

The previous prime is 13112431. The next prime is 13112443. The reversal of 13112442 is 24421131.

It is a super-2 number, since 2×13112442² = 343872270406728, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (13112443) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 34968 + ... + 35340.

Almost surely, 2^13112442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13112442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17377536).

13112442 is an abundant number, since it is smaller than the sum of its proper divisors (21642630).

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

13112442 is a wasteful number, since it uses less digits than its factorization.

13112442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425 (or 416 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 13112442 is about 3621.1106031161. The cubic root of 13112442 is about 235.8094435159.

Adding to 13112442 its reverse (24421131), we get a palindrome (37533573).

The spelling of 13112442 in words is "thirteen million, one hundred twelve thousand, four hundred forty-two".