1200279 has 4 divisors (see below), whose sum is σ = 1600376. Its totient is φ = 800184.

The previous prime is 1200253. The next prime is 1200307. The reversal of 1200279 is 9720021.

It is a happy number.

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

It is not a de Polignac number, because 1200279 - 2⁹ = 1199767 is a prime.

It is a D-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 (1200179) 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, 200044 + ... + 200049.

It is an arithmetic number, because the mean of its divisors is an integer number (400094).

2^1200279 is an apocalyptic number.

1200279 is a deficient number, since it is larger than the sum of its proper divisors (400097).

1200279 is an equidigital number, since it uses as much as digits as its factorization.

1200279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400096.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1200279 is about 1095.5724531039. The cubic root of 1200279 is about 106.2740918840.

The spelling of 1200279 in words is "one million, two hundred thousand, two hundred seventy-nine".