1213679 has 4 divisors (see below), whose sum is σ = 1255560. Its totient is φ = 1171800.

The previous prime is 1213673. The next prime is 1213721. The reversal of 1213679 is 9763121.

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 1213679 - 2¹² = 1209583 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 41851 = 1213679 / (1 + 2 + 1 + 3 + 6 + 7 + 9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213673) 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, 20897 + ... + 20954.

It is an arithmetic number, because the mean of its divisors is an integer number (313890).

2^1213679 is an apocalyptic number.

1213679 is a deficient number, since it is larger than the sum of its proper divisors (41881).

1213679 is an equidigital number, since it uses as much as digits as its factorization.

1213679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41880.

The product of its digits is 2268, while the sum is 29.

The square root of 1213679 is about 1101.6710035215. The cubic root of 1213679 is about 106.6681130446.

The spelling of 1213679 in words is "one million, two hundred thirteen thousand, six hundred seventy-nine".