1213606135 has 32 divisors (see below), whose sum is σ = 1721475072. Its totient is φ = 803744640.

The previous prime is 1213606127. The next prime is 1213606153. The reversal of 1213606135 is 5316063121.

It is not a de Polignac number, because 1213606135 - 2³ = 1213606127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 837982 + ... + 839428.

It is an arithmetic number, because the mean of its divisors is an integer number (53796096).

Almost surely, 2^1213606135 is an apocalyptic number.

1213606135 is a deficient number, since it is larger than the sum of its proper divisors (507868937).

1213606135 is a wasteful number, since it uses less digits than its factorization.

1213606135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2263.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 1213606135 is about 34836.8502451068. The cubic root of 1213606135 is about 1066.6597834300.

Adding to 1213606135 its reverse (5316063121), we get a palindrome (6529669256).

The spelling of 1213606135 in words is "one billion, two hundred thirteen million, six hundred six thousand, one hundred thirty-five".