1213159285 has 32 divisors (see below), whose sum is σ = 1601873280. Its totient is φ = 876572928.

The previous prime is 1213159273. The next prime is 1213159307. The reversal of 1213159285 is 5829513121.

It is a cyclic number.

It is not a de Polignac number, because 1213159285 - 2¹⁷ = 1213028213 is a prime.

It is a super-2 number, since 2×1213159285² = 2943510901563422450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 709011 + ... + 710719.

It is an arithmetic number, because the mean of its divisors is an integer number (50058540).

Almost surely, 2^1213159285 is an apocalyptic number.

It is an amenable number.

1213159285 is a deficient number, since it is larger than the sum of its proper divisors (388713995).

1213159285 is a wasteful number, since it uses less digits than its factorization.

1213159285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1957.

The product of its digits is 21600, while the sum is 37.

The square root of 1213159285 is about 34830.4361873348. The cubic root of 1213159285 is about 1066.5288525835.

The spelling of 1213159285 in words is "one billion, two hundred thirteen million, one hundred fifty-nine thousand, two hundred eighty-five".