1284279 has 4 divisors (see below), whose sum is σ = 1712376. Its totient is φ = 856184.

The previous prime is 1284271. The next prime is 1284287. The reversal of 1284279 is 9724821.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1284271) and next prime (1284287).

It is a cyclic number.

It is not a de Polignac number, because 1284279 - 2³ = 1284271 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 (1284271) 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, 214044 + ... + 214049.

It is an arithmetic number, because the mean of its divisors is an integer number (428094).

2^1284279 is an apocalyptic number.

1284279 is a deficient number, since it is larger than the sum of its proper divisors (428097).

1284279 is an equidigital number, since it uses as much as digits as its factorization.

1284279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428096.

The product of its digits is 8064, while the sum is 33.

The square root of 1284279 is about 1133.2603407867. The cubic root of 1284279 is about 108.6975596025.

It can be divided in two parts, 12842 and 79, that added together give a palindrome (12921).

The spelling of 1284279 in words is "one million, two hundred eighty-four thousand, two hundred seventy-nine".