1206428017 has 4 divisors (see below), whose sum is σ = 1206504180. Its totient is φ = 1206351856.

The previous prime is 1206428011. The next prime is 1206428021. The reversal of 1206428017 is 7108246021.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7108246021 = 43 ⋅165308047.

It can be written as a sum of positive squares in 2 ways, for example, as 572597041 + 633830976 = 23929^2 + 25176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1206428017 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 1206428017.

It is not an unprimeable number, because it can be changed into a prime (1206428011) 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, 4378 + ... + 49315.

It is an arithmetic number, because the mean of its divisors is an integer number (301626045).

Almost surely, 2^1206428017 is an apocalyptic number.

It is an amenable number.

1206428017 is a deficient number, since it is larger than the sum of its proper divisors (76163).

1206428017 is an equidigital number, since it uses as much as digits as its factorization.

1206428017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76162.

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 1206428017 is about 34733.6726678881. The cubic root of 1206428017 is about 1064.5526321640.

The spelling of 1206428017 in words is "one billion, two hundred six million, four hundred twenty-eight thousand, seventeen".