122139515 has 8 divisors (see below), whose sum is σ = 146803488. Its totient is φ = 97554240.

The previous prime is 122139497. The next prime is 122139529. The reversal of 122139515 is 515931221.

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

It is not a de Polignac number, because 122139515 - 2¹⁰ = 122138491 is a prime.

It is a super-2 number, since 2×122139515² = 29836122248870450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16202 + ... + 22511.

It is an arithmetic number, because the mean of its divisors is an integer number (18350436).

Almost surely, 2^122139515 is an apocalyptic number.

122139515 is a deficient number, since it is larger than the sum of its proper divisors (24663973).

122139515 is an equidigital number, since it uses as much as digits as its factorization.

122139515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39349.

The product of its digits is 2700, while the sum is 29.

The square root of 122139515 is about 11051.6747599629. The cubic root of 122139515 is about 496.1565515084.

The spelling of 122139515 in words is "one hundred twenty-two million, one hundred thirty-nine thousand, five hundred fifteen".