1206643101 has 8 divisors (see below), whose sum is σ = 1660756224. Its totient is φ = 778479360.

The previous prime is 1206643069. The next prime is 1206643169. The reversal of 1206643101 is 1013466021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1206643101 - 2⁵ = 1206643069 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206641101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6487236 + ... + 6487421.

It is an arithmetic number, because the mean of its divisors is an integer number (207594528).

Almost surely, 2^1206643101 is an apocalyptic number.

It is an amenable number.

1206643101 is a deficient number, since it is larger than the sum of its proper divisors (454113123).

1206643101 is a wasteful number, since it uses less digits than its factorization.

1206643101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12974691.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1206643101 is about 34736.7687184631. The cubic root of 1206643101 is about 1064.6158918114.

The spelling of 1206643101 in words is "one billion, two hundred six million, six hundred forty-three thousand, one hundred one".