122120872 has 8 divisors (see below), whose sum is σ = 228976650. Its totient is φ = 61060432.

The previous prime is 122120863. The next prime is 122120879. The reversal of 122120872 is 278021221.

It can be written as a sum of positive squares in only one way, i.e., 103510276 + 18610596 = 10174^2 + 4314^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (122120879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7632547 + ... + 7632562.

Almost surely, 2^122120872 is an apocalyptic number.

It is an amenable number.

122120872 is a deficient number, since it is larger than the sum of its proper divisors (106855778).

122120872 is a wasteful number, since it uses less digits than its factorization.

122120872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15265115 (or 15265111 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 122120872 is about 11050.8312809490. The cubic root of 122120872 is about 496.1313062872.

The spelling of 122120872 in words is "one hundred twenty-two million, one hundred twenty thousand, eight hundred seventy-two".