1222478143 has 4 divisors (see below), whose sum is σ = 1294388640. Its totient is φ = 1150567648.

The previous prime is 1222478137. The next prime is 1222478161. The reversal of 1222478143 is 3418742221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3418742221 = 27943 ⋅122347.

It is a cyclic number.

It is not a de Polignac number, because 1222478143 - 2⁵ = 1222478111 is a prime.

It is a super-2 number, since 2×1222478143² = 2988905620225456898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1222478099 and 1222478108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222478123) 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, 35955223 + ... + 35955256.

It is an arithmetic number, because the mean of its divisors is an integer number (323597160).

Almost surely, 2^1222478143 is an apocalyptic number.

1222478143 is a deficient number, since it is larger than the sum of its proper divisors (71910497).

1222478143 is an equidigital number, since it uses as much as digits as its factorization.

1222478143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71910496.

The product of its digits is 21504, while the sum is 34.

The square root of 1222478143 is about 34963.9549107363. The cubic root of 1222478143 is about 1069.2527297616.

The spelling of 1222478143 in words is "one billion, two hundred twenty-two million, four hundred seventy-eight thousand, one hundred forty-three".