122157293 has 4 divisors (see below), whose sum is σ = 122348508. Its totient is φ = 121966080.

The previous prime is 122157271. The next prime is 122157311. The reversal of 122157293 is 392751221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 78623689 + 43533604 = 8867^2 + 6598^2 .

It is a cyclic number.

It is not a de Polignac number, because 122157293 - 2⁶ = 122157229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122157493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94646 + ... + 95927.

It is an arithmetic number, because the mean of its divisors is an integer number (30587127).

Almost surely, 2^122157293 is an apocalyptic number.

It is an amenable number.

122157293 is a deficient number, since it is larger than the sum of its proper divisors (191215).

122157293 is an equidigital number, since it uses as much as digits as its factorization.

122157293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191214.

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

The square root of 122157293 is about 11052.4790431830. The cubic root of 122157293 is about 496.1806230064.

The spelling of 122157293 in words is "one hundred twenty-two million, one hundred fifty-seven thousand, two hundred ninety-three".