1068391 has 4 divisors (see below), whose sum is σ = 1071000. Its totient is φ = 1065784.

The previous prime is 1068383. The next prime is 1068407. The reversal of 1068391 is 1938601.

It is a happy number.

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 1068391 - 2³ = 1068383 is a prime.

It is a super-2 number, since 2×1068391² = 2282918657762, which contains 22 as substring.

It is a Duffinian number.

1068391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1068311) 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, 541 + ... + 1558.

It is an arithmetic number, because the mean of its divisors is an integer number (267750).

2^1068391 is an apocalyptic number.

1068391 is a deficient number, since it is larger than the sum of its proper divisors (2609).

1068391 is an equidigital number, since it uses as much as digits as its factorization.

1068391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2608.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1068391 is about 1033.6300111742. The cubic root of 1068391 is about 102.2296185487.

The spelling of 1068391 in words is "one million, sixty-eight thousand, three hundred ninety-one".