122739 has 8 divisors (see below), whose sum is σ = 165312. Its totient is φ = 81000.

The previous prime is 122719. The next prime is 122741. The reversal of 122739 is 937221.

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

It is not a de Polignac number, because 122739 - 2⁷ = 122611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (122719) 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 7 ways as a sum of consecutive naturals, for example, 364 + ... + 614.

It is an arithmetic number, because the mean of its divisors is an integer number (20664).

2¹²²⁷³⁹ is an apocalyptic number.

122739 is a deficient number, since it is larger than the sum of its proper divisors (42573).

122739 is a wasteful number, since it uses less digits than its factorization.

122739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417.

The product of its digits is 756, while the sum is 24.

The square root of 122739 is about 350.3412622002. The cubic root of 122739 is about 49.6966972018.

It can be divided in two parts, 122 and 739, that added together give a triangular number (861 = T₄₁).

The spelling of 122739 in words is "one hundred twenty-two thousand, seven hundred thirty-nine".