1220142423 has 8 divisors (see below), whose sum is σ = 1679335936. Its totient is φ = 787188600.

The previous prime is 1220142409. The next prime is 1220142449. The reversal of 1220142423 is 3242410221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220142423 - 2⁶ = 1220142359 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220142423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220142023) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6559813 + ... + 6559998.

It is an arithmetic number, because the mean of its divisors is an integer number (209916992).

Almost surely, 2^1220142423 is an apocalyptic number.

1220142423 is a deficient number, since it is larger than the sum of its proper divisors (459193513).

1220142423 is a wasteful number, since it uses less digits than its factorization.

1220142423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13119845.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1220142423 is about 34930.5371129618. The cubic root of 1220142423 is about 1068.5713086429.

Adding to 1220142423 its reverse (3242410221), we get a palindrome (4462552644).

The spelling of 1220142423 in words is "one billion, two hundred twenty million, one hundred forty-two thousand, four hundred twenty-three".