13539942 has 36 divisors (see below), whose sum is σ = 31773924. Its totient is φ = 4165200.

The previous prime is 13539941. The next prime is 13539943. The reversal of 13539942 is 24993531.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (13539941) and next prime (13539943).

It is a junction number, because it is equal to n+sod(n) for n = 13539897 and 13539906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13539941) 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 17 ways as a sum of consecutive naturals, for example, 817 + ... + 5267.

It is an arithmetic number, because the mean of its divisors is an integer number (882609).

Almost surely, 2^13539942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13539942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15886962).

13539942 is an abundant number, since it is smaller than the sum of its proper divisors (18233982).

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

13539942 is a wasteful number, since it uses less digits than its factorization.

13539942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485 (or 4469 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 13539942 is about 3679.6660174532. Note that the first 3 decimals coincide. The cubic root of 13539942 is about 238.3447561100.

The spelling of 13539942 in words is "thirteen million, five hundred thirty-nine thousand, nine hundred forty-two".