1242022144 has 72 divisors (see below), whose sum is σ = 2733056928. Its totient is φ = 558612480.

The previous prime is 1242022139. The next prime is 1242022163. The reversal of 1242022144 is 4412202421.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 270879 + ... + 275425.

It is an arithmetic number, because the mean of its divisors is an integer number (37959124).

Almost surely, 2^1242022144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1242022144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1366528464).

1242022144 is an abundant number, since it is smaller than the sum of its proper divisors (1491034784).

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

1242022144 is an equidigital number, since it uses as much as digits as its factorization.

1242022144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671 (or 4657 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 1242022144 is about 35242.3345424221. The cubic root of 1242022144 is about 1074.9207495931.

Adding to 1242022144 its reverse (4412202421), we get a palindrome (5654224565).

The spelling of 1242022144 in words is "one billion, two hundred forty-two million, twenty-two thousand, one hundred forty-four".