1224156642 has 32 divisors (see below), whose sum is σ = 2586643200. Its totient is φ = 385596288.

The previous prime is 1224156599. The next prime is 1224156677. The reversal of 1224156642 is 2466514221.

1224156642 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66667 + ... + 83022.

It is an arithmetic number, because the mean of its divisors is an integer number (80832600).

Almost surely, 2^1224156642 is an apocalyptic number.

1224156642 is an abundant number, since it is smaller than the sum of its proper divisors (1362486558).

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

1224156642 is a wasteful number, since it uses less digits than its factorization.

1224156642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149770.

The product of its digits is 23040, while the sum is 33.

The square root of 1224156642 is about 34987.9499542342. The cubic root of 1224156642 is about 1069.7418779353.

The spelling of 1224156642 in words is "one billion, two hundred twenty-four million, one hundred fifty-six thousand, six hundred forty-two".