1223143421 has 4 divisors (see below), whose sum is σ = 1295093052. Its totient is φ = 1151193792.

The previous prime is 1223143417. The next prime is 1223143451. The reversal of 1223143421 is 1243413221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 876811321 + 346332100 = 29611^2 + 18610^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223143421 - 2² = 1223143417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223143451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35974790 + ... + 35974823.

It is an arithmetic number, because the mean of its divisors is an integer number (323773263).

Almost surely, 2^1223143421 is an apocalyptic number.

It is an amenable number.

1223143421 is a deficient number, since it is larger than the sum of its proper divisors (71949631).

1223143421 is an equidigital number, since it uses as much as digits as its factorization.

1223143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71949630.

The product of its digits is 1152, while the sum is 23.

The square root of 1223143421 is about 34973.4673860056. The cubic root of 1223143421 is about 1069.4466586049.

Adding to 1223143421 its reverse (1243413221), we get a palindrome (2466556642).

The spelling of 1223143421 in words is "one billion, two hundred twenty-three million, one hundred forty-three thousand, four hundred twenty-one".