1301206999 has 4 divisors (see below), whose sum is σ = 1302548040. Its totient is φ = 1299865960.

The previous prime is 1301206997. The next prime is 1301207023. The reversal of 1301206999 is 9996021031.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1301206999 - 2¹ = 1301206997 is a prime.

It is a Smith number, since the sum of its digits (40) 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 (1301206997) 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, 669064 + ... + 671005.

It is an arithmetic number, because the mean of its divisors is an integer number (325637010).

Almost surely, 2^1301206999 is an apocalyptic number.

1301206999 is a deficient number, since it is larger than the sum of its proper divisors (1341041).

1301206999 is an equidigital number, since it uses as much as digits as its factorization.

1301206999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341040.

The product of its (nonzero) digits is 26244, while the sum is 40.

The square root of 1301206999 is about 36072.2469358370. The cubic root of 1301206999 is about 1091.7305504043.

The spelling of 1301206999 in words is "one billion, three hundred one million, two hundred six thousand, nine hundred ninety-nine".