13891242 has 16 divisors (see below), whose sum is σ = 29244960. Its totient is φ = 4386672.

The previous prime is 13891231. The next prime is 13891249. The reversal of 13891242 is 24219831.

It is a super-4 number, since 4×13891242⁴ (a number of 30 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (13891249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60813 + ... + 61040.

It is an arithmetic number, because the mean of its divisors is an integer number (1827810).

Almost surely, 2^13891242 is an apocalyptic number.

13891242 is an abundant number, since it is smaller than the sum of its proper divisors (15353718).

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

13891242 is a wasteful number, since it uses less digits than its factorization.

13891242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121877.

The product of its digits is 3456, while the sum is 30.

The square root of 13891242 is about 3727.0956521130. The cubic root of 13891242 is about 240.3885027119.

The spelling of 13891242 in words is "thirteen million, eight hundred ninety-one thousand, two hundred forty-two".