122743139 has 8 divisors (see below), whose sum is σ = 124431552. Its totient is φ = 121059880.

The previous prime is 122743133. The next prime is 122743141. The reversal of 122743139 is 931347221.

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

It is a cyclic number.

It is not a de Polignac number, because 122743139 - 2⁴ = 122743123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122743133) 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, 79832 + ... + 81354.

It is an arithmetic number, because the mean of its divisors is an integer number (15553944).

Almost surely, 2^122743139 is an apocalyptic number.

122743139 is a deficient number, since it is larger than the sum of its proper divisors (1688413).

122743139 is an equidigital number, since it uses as much as digits as its factorization.

122743139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577.

The product of its digits is 9072, while the sum is 32.

The square root of 122743139 is about 11078.9502661579. The cubic root of 122743139 is about 496.9725581891.

The spelling of 122743139 in words is "one hundred twenty-two million, seven hundred forty-three thousand, one hundred thirty-nine".