1194282721 has 4 divisors (see below), whose sum is σ = 1206595012. Its totient is φ = 1181970432.

The previous prime is 1194282709. The next prime is 1194282743. The reversal of 1194282721 is 1272824911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1272824911 = 1229 ⋅1035659.

It can be written as a sum of positive squares in 2 ways, for example, as 199826496 + 994456225 = 14136^2 + 31535^2 .

It is a cyclic number.

It is not a de Polignac number, because 1194282721 - 2⁵ = 1194282689 is a prime.

It is a super-2 number, since 2×1194282721² = 2852622435358327682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1194282121) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6156000 + ... + 6156193.

It is an arithmetic number, because the mean of its divisors is an integer number (301648753).

Almost surely, 2^1194282721 is an apocalyptic number.

It is an amenable number.

1194282721 is a deficient number, since it is larger than the sum of its proper divisors (12312291).

1194282721 is an equidigital number, since it uses as much as digits as its factorization.

1194282721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12312290.

The product of its digits is 16128, while the sum is 37.

The square root of 1194282721 is about 34558.3958105697. The cubic root of 1194282721 is about 1060.9682386634.

The spelling of 1194282721 in words is "one billion, one hundred ninety-four million, two hundred eighty-two thousand, seven hundred twenty-one".