1200099 has 4 divisors (see below), whose sum is σ = 1600136. Its totient is φ = 800064.

The previous prime is 1200083. The next prime is 1200109. The reversal of 1200099 is 9900021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9900021 = 3 ⋅3300007.

It is not a de Polignac number, because 1200099 - 2⁴ = 1200083 is a prime.

It is a D-number.

It is a Duffinian number.

1200099 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1200499) 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, 200014 + ... + 200019.

It is an arithmetic number, because the mean of its divisors is an integer number (400034).

2^1200099 is an apocalyptic number.

1200099 is a deficient number, since it is larger than the sum of its proper divisors (400037).

1200099 is an equidigital number, since it uses as much as digits as its factorization.

1200099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400036.

The product of its (nonzero) digits is 162, while the sum is 21.

The square root of 1200099 is about 1095.4903011894. The cubic root of 1200099 is about 106.2687791490.

The spelling of 1200099 in words is "one million, two hundred thousand, ninety-nine".