1206821794 has 4 divisors (see below), whose sum is σ = 1810232694. Its totient is φ = 603410896.

The previous prime is 1206821783. The next prime is 1206821809. The reversal of 1206821794 is 4971286021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1189905025 + 16916769 = 34495^2 + 4113^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 301705447 + ... + 301705450.

Almost surely, 2^1206821794 is an apocalyptic number.

1206821794 is a deficient number, since it is larger than the sum of its proper divisors (603410900).

1206821794 is an equidigital number, since it uses as much as digits as its factorization.

1206821794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603410899.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 1206821794 is about 34739.3407248900. The cubic root of 1206821794 is about 1064.6684425662.

The spelling of 1206821794 in words is "one billion, two hundred six million, eight hundred twenty-one thousand, seven hundred ninety-four".