1223122842 has 80 divisors (see below), whose sum is σ = 2870081280. Its totient is φ = 388590048.

The previous prime is 1223122807. The next prime is 1223122843. The reversal of 1223122842 is 2482213221.

It is a super-3 number, since 3×1223122842³ (a number of 28 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1223122843) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1724784 + ... + 1725492.

It is an arithmetic number, because the mean of its divisors is an integer number (35876016).

Almost surely, 2^1223122842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223122842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1435040640).

1223122842 is an abundant number, since it is smaller than the sum of its proper divisors (1646958438).

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

1223122842 is a wasteful number, since it uses less digits than its factorization.

1223122842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209 (or 1200 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 1223122842 is about 34973.1731760216. The cubic root of 1223122842 is about 1069.4406608710.

The spelling of 1223122842 in words is "one billion, two hundred twenty-three million, one hundred twenty-two thousand, eight hundred forty-two".