13742239 has 12 divisors (see below), whose sum is σ = 16686064. Its totient is φ = 11084544.

The previous prime is 13742233. The next prime is 13742249. The reversal of 13742239 is 93224731.

It is not a de Polignac number, because 13742239 - 2³ = 13742231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13742239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13742231) 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 11 ways as a sum of consecutive naturals, for example, 1374 + ... + 5419.

Almost surely, 2^13742239 is an apocalyptic number.

13742239 is a deficient number, since it is larger than the sum of its proper divisors (2943825).

13742239 is an equidigital number, since it uses as much as digits as its factorization.

13742239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6834 (or 6817 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 13742239 is about 3707.0526028099. The cubic root of 13742239 is about 239.5259101766.

The spelling of 13742239 in words is "thirteen million, seven hundred forty-two thousand, two hundred thirty-nine".