1206291641 has 4 divisors (see below), whose sum is σ = 1206703092. Its totient is φ = 1205880192.

The previous prime is 1206291637. The next prime is 1206291643. The reversal of 1206291641 is 1461926021.

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 870486016 + 335805625 = 29504^2 + 18325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1206291641 - 2² = 1206291637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1206291598 and 1206291607.

It is not an unprimeable number, because it can be changed into a prime (1206291643) 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, 201296 + ... + 207201.

It is an arithmetic number, because the mean of its divisors is an integer number (301675773).

Almost surely, 2^1206291641 is an apocalyptic number.

It is an amenable number.

1206291641 is a deficient number, since it is larger than the sum of its proper divisors (411451).

1206291641 is an equidigital number, since it uses as much as digits as its factorization.

1206291641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411450.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1206291641 is about 34731.7094454045. The cubic root of 1206291641 is about 1064.5125179043.

The spelling of 1206291641 in words is "one billion, two hundred six million, two hundred ninety-one thousand, six hundred forty-one".