1206414721 has 4 divisors (see below), whose sum is σ = 1206596052. Its totient is φ = 1206233392.

The previous prime is 1206414719. The next prime is 1206414731. The reversal of 1206414721 is 1274146021.

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

It can be written as a sum of positive squares in 2 ways, for example, as 961930225 + 244484496 = 31015^2 + 15636^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206414721 - 2¹ = 1206414719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1206414721.

It is not an unprimeable number, because it can be changed into a prime (1206414731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80290 + ... + 94123.

It is an arithmetic number, because the mean of its divisors is an integer number (301649013).

Almost surely, 2^1206414721 is an apocalyptic number.

It is an amenable number.

1206414721 is a deficient number, since it is larger than the sum of its proper divisors (181331).

1206414721 is an equidigital number, since it uses as much as digits as its factorization.

1206414721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181330.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 1206414721 is about 34733.4812680791. The cubic root of 1206414721 is about 1064.5487213508.

The spelling of 1206414721 in words is "one billion, two hundred six million, four hundred fourteen thousand, seven hundred twenty-one".