122428769 has 4 divisors (see below), whose sum is σ = 124435860. Its totient is φ = 120421680.

The previous prime is 122428763. The next prime is 122428877. The reversal of 122428769 is 967824221.

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

It can be written as a sum of positive squares in 2 ways, for example, as 46512400 + 75916369 = 6820^2 + 8713^2 .

It is a cyclic number.

It is not a de Polignac number, because 122428769 - 2⁴ = 122428753 is a prime.

It is a super-2 number, since 2×122428769² = 29977606957710722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122428763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1003454 + ... + 1003575.

It is an arithmetic number, because the mean of its divisors is an integer number (31108965).

Almost surely, 2^122428769 is an apocalyptic number.

It is an amenable number.

122428769 is a deficient number, since it is larger than the sum of its proper divisors (2007091).

122428769 is an equidigital number, since it uses as much as digits as its factorization.

122428769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2007090.

The product of its digits is 96768, while the sum is 41.

The square root of 122428769 is about 11064.7534540992. The cubic root of 122428769 is about 496.5479130422.

The spelling of 122428769 in words is "one hundred twenty-two million, four hundred twenty-eight thousand, seven hundred sixty-nine".