122139566 has 8 divisors (see below), whose sum is σ = 189119424. Its totient is φ = 59099760.

The previous prime is 122139547. The next prime is 122139569. The reversal of 122139566 is 665931221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122139569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 984935 + ... + 985058.

It is an arithmetic number, because the mean of its divisors is an integer number (23639928).

Almost surely, 2^122139566 is an apocalyptic number.

122139566 is a deficient number, since it is larger than the sum of its proper divisors (66979858).

122139566 is a wasteful number, since it uses less digits than its factorization.

122139566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1970026.

The product of its digits is 19440, while the sum is 35.

The square root of 122139566 is about 11051.6770673052. The cubic root of 122139566 is about 496.1566205660.

The spelling of 122139566 in words is "one hundred twenty-two million, one hundred thirty-nine thousand, five hundred sixty-six".