122899842 has 90 divisors (see below), whose sum is σ = 302716953. Its totient is φ = 37250928.

The previous prime is 122899801. The next prime is 122899849. The reversal of 122899842 is 248998221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 105083001 + 17816841 = 10251^2 + 4221^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=7839.

It is not an unprimeable number, because it can be changed into a prime (122899849) 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 44 ways as a sum of consecutive naturals, for example, 1834293 + ... + 1834359.

Almost surely, 2^122899842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122899842

122899842 is an abundant number, since it is smaller than the sum of its proper divisors (179817111).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

122899842 is an equidigital number, since it uses as much as digits as its factorization.

122899842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174 (or 85 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 122899842 is about 11086.0201154427. The cubic root of 122899842 is about 497.1839589340.

Multiplying 122899842 by its product of digits (165888), we get a square (20387608989696 = 4515264²).

The spelling of 122899842 in words is "one hundred twenty-two million, eight hundred ninety-nine thousand, eight hundred forty-two".