1391167 has 4 divisors (see below), whose sum is σ = 1404040. Its totient is φ = 1378296.

The previous prime is 1391129. The next prime is 1391183. The reversal of 1391167 is 7611931.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1391167 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 (1391267) 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 3 ways as a sum of consecutive naturals, for example, 6273 + ... + 6490.

It is an arithmetic number, because the mean of its divisors is an integer number (351010).

2^1391167 is an apocalyptic number.

1391167 is a deficient number, since it is larger than the sum of its proper divisors (12873).

1391167 is a wasteful number, since it uses less digits than its factorization.

1391167 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12872.

The product of its digits is 1134, while the sum is 28.

The square root of 1391167 is about 1179.4774266598. The cubic root of 1391167 is about 111.6331267306.

The spelling of 1391167 in words is "one million, three hundred ninety-one thousand, one hundred sixty-seven".