1263279 has 4 divisors (see below), whose sum is σ = 1684376. Its totient is φ = 842184.

The previous prime is 1263263. The next prime is 1263299. The reversal of 1263279 is 9723621.

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

It is not a de Polignac number, because 1263279 - 2⁴ = 1263263 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263209) 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, 210544 + ... + 210549.

It is an arithmetic number, because the mean of its divisors is an integer number (421094).

2^1263279 is an apocalyptic number.

1263279 is a deficient number, since it is larger than the sum of its proper divisors (421097).

1263279 is an equidigital number, since it uses as much as digits as its factorization.

1263279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421096.

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

The square root of 1263279 is about 1123.9568497055. The cubic root of 1263279 is about 108.1018415213.

The spelling of 1263279 in words is "one million, two hundred sixty-three thousand, two hundred seventy-nine".