1200999 has 8 divisors (see below), whose sum is σ = 1695600. Its totient is φ = 753536.

The previous prime is 1200989. The next prime is 1201001. The reversal of 1200999 is 9990021.

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

It is a cyclic number.

It is not a de Polignac number, because 1200999 - 2¹⁵ = 1168231 is a prime.

1200999 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11724 + ... + 11825.

It is an arithmetic number, because the mean of its divisors is an integer number (211950).

2^1200999 is an apocalyptic number.

1200999 is a deficient number, since it is larger than the sum of its proper divisors (494601).

1200999 is a wasteful number, since it uses less digits than its factorization.

1200999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23569.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 1200999 is about 1095.9009991783. The cubic root of 1200999 is about 106.2953375142.

The spelling of 1200999 in words is "one million, two hundred thousand, nine hundred ninety-nine".