1230279 has 4 divisors (see below), whose sum is σ = 1640376. Its totient is φ = 820184.

The previous prime is 1230263. The next prime is 1230301. The reversal of 1230279 is 9720321.

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 1230279 - 2⁴ = 1230263 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230379) 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 3 ways as a sum of consecutive naturals, for example, 205044 + ... + 205049.

It is an arithmetic number, because the mean of its divisors is an integer number (410094).

2^1230279 is an apocalyptic number.

1230279 is a deficient number, since it is larger than the sum of its proper divisors (410097).

1230279 is an equidigital number, since it uses as much as digits as its factorization.

1230279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410096.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 1230279 is about 1109.1794264230. The cubic root of 1230279 is about 107.1522274979.

The spelling of 1230279 in words is "one million, two hundred thirty thousand, two hundred seventy-nine".