1220441423 has 4 divisors (see below), whose sum is σ = 1262525640. Its totient is φ = 1178357208.

The previous prime is 1220441413. The next prime is 1220441429. The reversal of 1220441423 is 3241440221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220441423 - 2¹⁶ = 1220375887 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 (1220441429) 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, 21042065 + ... + 21042122.

It is an arithmetic number, because the mean of its divisors is an integer number (315631410).

Almost surely, 2^1220441423 is an apocalyptic number.

1220441423 is a deficient number, since it is larger than the sum of its proper divisors (42084217).

1220441423 is an equidigital number, since it uses as much as digits as its factorization.

1220441423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42084216.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1220441423 is about 34934.8167735284. The cubic root of 1220441423 is about 1068.6585871771.

Adding to 1220441423 its reverse (3241440221), we get a palindrome (4461881644).

The spelling of 1220441423 in words is "one billion, two hundred twenty million, four hundred forty-one thousand, four hundred twenty-three".