122870157 has 4 divisors (see below), whose sum is σ = 163826880. Its totient is φ = 81913436.

The previous prime is 122870149. The next prime is 122870159. The reversal of 122870157 is 751078221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 122870157 - 2³ = 122870149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122870159) 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, 20478357 + ... + 20478362.

It is an arithmetic number, because the mean of its divisors is an integer number (40956720).

Almost surely, 2^122870157 is an apocalyptic number.

It is an amenable number.

122870157 is a deficient number, since it is larger than the sum of its proper divisors (40956723).

122870157 is an equidigital number, since it uses as much as digits as its factorization.

122870157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40956722.

The product of its (nonzero) digits is 7840, while the sum is 33.

The square root of 122870157 is about 11084.6811862137. The cubic root of 122870157 is about 497.1439260801.

The spelling of 122870157 in words is "one hundred twenty-two million, eight hundred seventy thousand, one hundred fifty-seven".