13440042 has 48 divisors (see below), whose sum is σ = 36309312. Its totient is φ = 3490560.

The previous prime is 13440041. The next prime is 13440043. The reversal of 13440042 is 24004431.

It is an interprime number because it is at equal distance from previous prime (13440041) and next prime (13440043).

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

It is a junction number, because it is equal to n+sod(n) for n = 13439997 and 13440024.

It is not an unprimeable number, because it can be changed into a prime (13440041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3463 + ... + 6234.

It is an arithmetic number, because the mean of its divisors is an integer number (756444).

Almost surely, 2^13440042 is an apocalyptic number.

13440042 is an abundant number, since it is smaller than the sum of its proper divisors (22869270).

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

13440042 is a wasteful number, since it uses less digits than its factorization.

13440042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9723 (or 9720 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 13440042 is about 3666.0662841798. The cubic root of 13440042 is about 237.7571257737.

Adding to 13440042 its reverse (24004431), we get a palindrome (37444473).

The spelling of 13440042 in words is "thirteen million, four hundred forty thousand, forty-two".