1213835136 has 64 divisors (see below), whose sum is σ = 3335461200. Its totient is φ = 390656000.

The previous prime is 1213835123. The next prime is 1213835137. The reversal of 1213835136 is 6315383121.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 1213835097 and 1213835106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213835137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43365 + ... + 65636.

Almost surely, 2^1213835136 is an apocalyptic number.

1213835136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1213835136 is an abundant number, since it is smaller than the sum of its proper divisors (2121626064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1213835136 is a wasteful number, since it uses less digits than its factorization.

1213835136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109047 (or 109035 counting only the distinct ones).

The product of its digits is 12960, while the sum is 33.

The square root of 1213835136 is about 34840.1368539218. The cubic root of 1213835136 is about 1066.7268702131.

It can be divided in two parts, 12138 and 35136, that added together give a palindrome (47274).

The spelling of 1213835136 in words is "one billion, two hundred thirteen million, eight hundred thirty-five thousand, one hundred thirty-six".