1243679 has 6 divisors (see below), whose sum is σ = 1300656. Its totient is φ = 1189100.

The previous prime is 1243673. The next prime is 1243691. The reversal of 1243679 is 9763421.

It is not a de Polignac number, because 1243679 - 2⁴ = 1243663 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 (1243673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 647 + ... + 1704.

It is an arithmetic number, because the mean of its divisors is an integer number (216776).

2^1243679 is an apocalyptic number.

1243679 is a deficient number, since it is larger than the sum of its proper divisors (56977).

1243679 is an equidigital number, since it uses as much as digits as its factorization.

1243679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2397 (or 2374 counting only the distinct ones).

The product of its digits is 9072, while the sum is 32.

The square root of 1243679 is about 1115.2035688609. The cubic root of 1243679 is about 107.5398518191.

The spelling of 1243679 in words is "one million, two hundred forty-three thousand, six hundred seventy-nine".