1279247 has 4 divisors (see below), whose sum is σ = 1295520. Its totient is φ = 1262976.

The previous prime is 1279211. The next prime is 1279249. The reversal of 1279247 is 7429721.

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 1279247 - 2⁶ = 1279183 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1279249) 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, 8018 + ... + 8175.

It is an arithmetic number, because the mean of its divisors is an integer number (323880).

2^1279247 is an apocalyptic number.

1279247 is a deficient number, since it is larger than the sum of its proper divisors (16273).

1279247 is an equidigital number, since it uses as much as digits as its factorization.

1279247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16272.

The product of its digits is 7056, while the sum is 32.

The square root of 1279247 is about 1131.0380188128. The cubic root of 1279247 is about 108.5554092742. Note that the first 3 decimals are identical.

The spelling of 1279247 in words is "one million, two hundred seventy-nine thousand, two hundred forty-seven".