1213085236 has 24 divisors (see below), whose sum is σ = 2316837600. Its totient is φ = 551176800.

The previous prime is 1213085233. The next prime is 1213085243. The reversal of 1213085236 is 6325803121.

It is a junction number, because it is equal to n+sod(n) for n = 1213085198 and 1213085207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213085233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153715 + ... + 161413.

It is an arithmetic number, because the mean of its divisors is an integer number (96534900).

Almost surely, 2^1213085236 is an apocalyptic number.

It is an amenable number.

1213085236 is a deficient number, since it is larger than the sum of its proper divisors (1103752364).

1213085236 is a wasteful number, since it uses less digits than its factorization.

1213085236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11295 (or 11293 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1213085236 is about 34829.3731783964. The cubic root of 1213085236 is about 1066.5071524922.

Adding to 1213085236 its reverse (6325803121), we get a palindrome (7538888357).

The spelling of 1213085236 in words is "one billion, two hundred thirteen million, eighty-five thousand, two hundred thirty-six".