1279263 has 4 divisors (see below), whose sum is σ = 1705688. Its totient is φ = 852840.

The previous prime is 1279253. The next prime is 1279303. The reversal of 1279263 is 3629721.

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

It is not a de Polignac number, because 1279263 - 2¹⁸ = 1017119 is a prime.

It is a super-3 number, since 3×1279263³ = 6280594748905933341, which contains 333 as substring.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1279263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279253) 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, 213208 + ... + 213213.

It is an arithmetic number, because the mean of its divisors is an integer number (426422).

2^1279263 is an apocalyptic number.

1279263 is a deficient number, since it is larger than the sum of its proper divisors (426425).

1279263 is an equidigital number, since it uses as much as digits as its factorization.

1279263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426424.

The product of its digits is 4536, while the sum is 30.

The square root of 1279263 is about 1131.0450919393. The cubic root of 1279263 is about 108.5558618527. Note that the first 3 decimals are identical.

The spelling of 1279263 in words is "one million, two hundred seventy-nine thousand, two hundred sixty-three".