1213243135 has 32 divisors (see below), whose sum is σ = 1614820032. Its totient is φ = 869253120.

The previous prime is 1213243127. The next prime is 1213243183. The reversal of 1213243135 is 5313423121.

It is a happy number.

It is not a de Polignac number, because 1213243135 - 2³ = 1213243127 is a prime.

It is a Duffinian number.

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, 1541212 + ... + 1541998.

It is an arithmetic number, because the mean of its divisors is an integer number (50463126).

Almost surely, 2^1213243135 is an apocalyptic number.

1213243135 is a deficient number, since it is larger than the sum of its proper divisors (401576897).

1213243135 is a wasteful number, since it uses less digits than its factorization.

1213243135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1483.

The product of its digits is 2160, while the sum is 25.

The square root of 1213243135 is about 34831.6398551662. The cubic root of 1213243135 is about 1066.5534237961.

Adding to 1213243135 its reverse (5313423121), we get a palindrome (6526666256).

The spelling of 1213243135 in words is "one billion, two hundred thirteen million, two hundred forty-three thousand, one hundred thirty-five".