122991236 has 24 divisors (see below), whose sum is σ = 219020760. Its totient is φ = 60422912.

The previous prime is 122991227. The next prime is 122991251. The reversal of 122991236 is 632199221.

It can be written as a sum of positive squares in 4 ways, for example, as 2869636 + 120121600 = 1694^2 + 10960^2 .

It is a junction number, because it is equal to n+sod(n) for n = 122991196 and 122991205.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60590 + ... + 62586.

It is an arithmetic number, because the mean of its divisors is an integer number (9125865).

Almost surely, 2^122991236 is an apocalyptic number.

It is an amenable number.

122991236 is a deficient number, since it is larger than the sum of its proper divisors (96029524).

122991236 is a wasteful number, since it uses less digits than its factorization.

122991236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263 (or 2261 counting only the distinct ones).

The product of its digits is 11664, while the sum is 35.

The square root of 122991236 is about 11090.1413877371. The cubic root of 122991236 is about 497.3071713835.

The spelling of 122991236 in words is "one hundred twenty-two million, nine hundred ninety-one thousand, two hundred thirty-six".