122257139 has 8 divisors (see below), whose sum is σ = 125805840. Its totient is φ = 118721376.

The previous prime is 122257133. The next prime is 122257141. The reversal of 122257139 is 931752221.

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 122257139 - 2⁴ = 122257123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122257133) 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, 17897 + ... + 23765.

It is an arithmetic number, because the mean of its divisors is an integer number (15725730).

Almost surely, 2^122257139 is an apocalyptic number.

122257139 is a deficient number, since it is larger than the sum of its proper divisors (3548701).

122257139 is an equidigital number, since it uses as much as digits as its factorization.

122257139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6469.

The product of its digits is 7560, while the sum is 32.

The square root of 122257139 is about 11056.9950257744. The cubic root of 122257139 is about 496.3157715995.

The spelling of 122257139 in words is "one hundred twenty-two million, two hundred fifty-seven thousand, one hundred thirty-nine".