1206365641 has 4 divisors (see below), whose sum is σ = 1299163012. Its totient is φ = 1113568272.

The previous prime is 1206365609. The next prime is 1206365669. The reversal of 1206365641 is 1465636021.

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 318087225 + 888278416 = 17835^2 + 29804^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206365641 - 2⁵ = 1206365609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1206365597 and 1206365606.

It is not an unprimeable number, because it can be changed into a prime (1206360641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46398666 + ... + 46398691.

It is an arithmetic number, because the mean of its divisors is an integer number (324790753).

Almost surely, 2^1206365641 is an apocalyptic number.

It is an amenable number.

1206365641 is a deficient number, since it is larger than the sum of its proper divisors (92797371).

1206365641 is an equidigital number, since it uses as much as digits as its factorization.

1206365641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92797370.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 1206365641 is about 34732.7747379906. The cubic root of 1206365641 is about 1064.5342849775.

The spelling of 1206365641 in words is "one billion, two hundred six million, three hundred sixty-five thousand, six hundred forty-one".