1243163255 has 16 divisors (see below), whose sum is σ = 1608616800. Its totient is φ = 919203840.

The previous prime is 1243163171. The next prime is 1243163261. The reversal of 1243163255 is 5523613421.

It is a happy number.

It is not a de Polignac number, because 1243163255 - 2³⁰ = 169421431 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155690 + ... + 163479.

It is an arithmetic number, because the mean of its divisors is an integer number (100538550).

Almost surely, 2^1243163255 is an apocalyptic number.

1243163255 is a deficient number, since it is larger than the sum of its proper divisors (365453545).

1243163255 is a wasteful number, since it uses less digits than its factorization.

1243163255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319234.

The product of its digits is 21600, while the sum is 32.

The square root of 1243163255 is about 35258.5203177899. The cubic root of 1243163255 is about 1075.2498442179.

Adding to 1243163255 its reverse (5523613421), we get a palindrome (6766776676).

The spelling of 1243163255 in words is "one billion, two hundred forty-three million, one hundred sixty-three thousand, two hundred fifty-five".