1220356143 has 6 divisors (see below), whose sum is σ = 1762736664. Its totient is φ = 813570756.

The previous prime is 1220356141. The next prime is 1220356153. The reversal of 1220356143 is 3416530221.

1220356143 is a `hidden beast` number, since 12 + 2 + 0 + 35 + 614 + 3 = 666.

It is not a de Polignac number, because 1220356143 - 2¹ = 1220356141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220356141) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67797555 + ... + 67797572.

It is an arithmetic number, because the mean of its divisors is an integer number (293789444).

Almost surely, 2^1220356143 is an apocalyptic number.

1220356143 is a deficient number, since it is larger than the sum of its proper divisors (542380521).

1220356143 is a wasteful number, since it uses less digits than its factorization.

1220356143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135595133 (or 135595130 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1220356143 is about 34933.5961933495. The cubic root of 1220356143 is about 1068.6336952745.

Adding to 1220356143 its reverse (3416530221), we get a palindrome (4636886364).

The spelling of 1220356143 in words is "one billion, two hundred twenty million, three hundred fifty-six thousand, one hundred forty-three".