1223421144 has 64 divisors (see below), whose sum is σ = 3451680000. Its totient is φ = 357947520.

The previous prime is 1223421137. The next prime is 1223421161. The reversal of 1223421144 is 4411243221.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72244 + ... + 87555.

It is an arithmetic number, because the mean of its divisors is an integer number (53932500).

Almost surely, 2^1223421144 is an apocalyptic number.

It is an amenable number.

1223421144 is an abundant number, since it is smaller than the sum of its proper divisors (2228258856).

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

1223421144 is a wasteful number, since it uses less digits than its factorization.

1223421144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159848 (or 159844 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 1223421144 is about 34977.4376420000. The cubic root of 1223421144 is about 1069.5275941825.

Adding to 1223421144 its reverse (4411243221), we get a palindrome (5634664365).

The spelling of 1223421144 in words is "one billion, two hundred twenty-three million, four hundred twenty-one thousand, one hundred forty-four".