1206660541 has 4 divisors (see below), whose sum is σ = 1206964800. Its totient is φ = 1206356284.

The previous prime is 1206660509. The next prime is 1206660551. The reversal of 1206660541 is 1450666021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1206660541 - 2⁵ = 1206660509 is a prime.

It is a super-2 number, since 2×1206660541² = 2912059322412825362, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206660551) 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, 146101 + ... + 154138.

It is an arithmetic number, because the mean of its divisors is an integer number (301741200).

Almost surely, 2^1206660541 is an apocalyptic number.

It is an amenable number.

1206660541 is a deficient number, since it is larger than the sum of its proper divisors (304259).

1206660541 is an equidigital number, since it uses as much as digits as its factorization.

1206660541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304258.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1206660541 is about 34737.0197483895. The cubic root of 1206660541 is about 1064.6210208650.

The spelling of 1206660541 in words is "one billion, two hundred six million, six hundred sixty thousand, five hundred forty-one".