1222425143 has 4 divisors (see below), whose sum is σ = 1222878768. Its totient is φ = 1221971520.

The previous prime is 1222425053. The next prime is 1222425151. The reversal of 1222425143 is 3415242221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3415242221 = 313 ⋅10911317.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222425143 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 (1222425163) 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 3 ways as a sum of consecutive naturals, for example, 222746 + ... + 228167.

It is an arithmetic number, because the mean of its divisors is an integer number (305719692).

Almost surely, 2^1222425143 is an apocalyptic number.

1222425143 is a deficient number, since it is larger than the sum of its proper divisors (453625).

1222425143 is an equidigital number, since it uses as much as digits as its factorization.

1222425143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453624.

The product of its digits is 3840, while the sum is 26.

The square root of 1222425143 is about 34963.1969791093. The cubic root of 1222425143 is about 1069.2372772117.

Adding to 1222425143 its reverse (3415242221), we get a palindrome (4637667364).

The spelling of 1222425143 in words is "one billion, two hundred twenty-two million, four hundred twenty-five thousand, one hundred forty-three".