13239771 has 8 divisors (see below), whose sum is σ = 17986320. Its totient is φ = 8659872.

The previous prime is 13239763. The next prime is 13239773. The reversal of 13239771 is 17793231.

It is a happy number.

13239771 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13239771 - 2³ = 13239763 is a prime.

It is a super-2 number, since 2×13239771² = 350583072264882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13239773) 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, 41476 + ... + 41793.

It is an arithmetic number, because the mean of its divisors is an integer number (2248290).

Almost surely, 2^13239771 is an apocalyptic number.

13239771 is a deficient number, since it is larger than the sum of its proper divisors (4746549).

13239771 is an equidigital number, since it uses as much as digits as its factorization.

13239771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83325.

The product of its digits is 7938, while the sum is 33.

The square root of 13239771 is about 3638.6496121501. The cubic root of 13239771 is about 236.5702657927.

It can be divided in two parts, 132 and 39771, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 13239771 in words is "thirteen million, two hundred thirty-nine thousand, seven hundred seventy-one".