122781283 has 4 divisors (see below), whose sum is σ = 122824240. Its totient is φ = 122738328.

The previous prime is 122781257. The next prime is 122781289. The reversal of 122781283 is 382187221.

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

It is a cyclic number.

It is not a de Polignac number, because 122781283 - 2⁵ = 122781251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (122781289) 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, 16860 + ... + 23017.

It is an arithmetic number, because the mean of its divisors is an integer number (30706060).

Almost surely, 2^122781283 is an apocalyptic number.

122781283 is a deficient number, since it is larger than the sum of its proper divisors (42957).

122781283 is an equidigital number, since it uses as much as digits as its factorization.

122781283 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42956.

The product of its digits is 10752, while the sum is 34.

The square root of 122781283 is about 11080.6715951697. The cubic root of 122781283 is about 497.0240330498.

The spelling of 122781283 in words is "one hundred twenty-two million, seven hundred eighty-one thousand, two hundred eighty-three".