122009139 has 32 divisors (see below), whose sum is σ = 207552000. Its totient is φ = 69390432.

The previous prime is 122009131. The next prime is 122009159. The reversal of 122009139 is 931900221.

It is not a de Polignac number, because 122009139 - 2³ = 122009131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (122009131) 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, 41872 + ... + 44690.

It is an arithmetic number, because the mean of its divisors is an integer number (6486000).

Almost surely, 2^122009139 is an apocalyptic number.

122009139 is a deficient number, since it is larger than the sum of its proper divisors (85542861).

122009139 is a wasteful number, since it uses less digits than its factorization.

122009139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3064 (or 3058 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 122009139 is about 11045.7747125315. The cubic root of 122009139 is about 495.9799503580.

The spelling of 122009139 in words is "one hundred twenty-two million, nine thousand, one hundred thirty-nine".