1206821834 has 8 divisors (see below), whose sum is σ = 1872654660. Its totient is φ = 582603616.

The previous prime is 1206821827. The next prime is 1206821897. The reversal of 1206821834 is 4381286021.

It can be written as a sum of positive squares in 2 ways, for example, as 1183153609 + 23668225 = 34397^2 + 4865^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1206821794 and 1206821803.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10403579 + ... + 10403694.

Almost surely, 2^1206821834 is an apocalyptic number.

1206821834 is a deficient number, since it is larger than the sum of its proper divisors (665832826).

1206821834 is a wasteful number, since it uses less digits than its factorization.

1206821834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20807304.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1206821834 is about 34739.3413006061. The cubic root of 1206821834 is about 1064.6684543290.

The spelling of 1206821834 in words is "one billion, two hundred six million, eight hundred twenty-one thousand, eight hundred thirty-four".