122785042 has 4 divisors (see below), whose sum is σ = 184177566. Its totient is φ = 61392520.

The previous prime is 122785007. The next prime is 122785073. The reversal of 122785042 is 240587221.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 117267241 + 5517801 = 10829^2 + 2349^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 122784995 and 122785013.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30696259 + ... + 30696262.

Almost surely, 2^122785042 is an apocalyptic number.

122785042 is a deficient number, since it is larger than the sum of its proper divisors (61392524).

122785042 is an equidigital number, since it uses as much as digits as its factorization.

122785042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61392523.

The product of its (nonzero) digits is 8960, while the sum is 31.

The square root of 122785042 is about 11080.8412135541. The cubic root of 122785042 is about 497.0291051972.

The spelling of 122785042 in words is "one hundred twenty-two million, seven hundred eighty-five thousand, forty-two".