139279122 has 64 divisors (see below), whose sum is σ = 325877760. Its totient is φ = 44008272.

The previous prime is 139279097. The next prime is 139279123. The reversal of 139279122 is 221972931.

It is not an unprimeable number, because it can be changed into a prime (139279123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 157293 + ... + 158175.

It is an arithmetic number, because the mean of its divisors is an integer number (5091840).

Almost surely, 2^139279122 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 139279122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162938880).

139279122 is an abundant number, since it is smaller than the sum of its proper divisors (186598638).

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

139279122 is a wasteful number, since it uses less digits than its factorization.

139279122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 1038 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 139279122 is about 11801.6575954397. The cubic root of 139279122 is about 518.3566487883.

The spelling of 139279122 in words is "one hundred thirty-nine million, two hundred seventy-nine thousand, one hundred twenty-two".