1336391 has 4 divisors (see below), whose sum is σ = 1527312. Its totient is φ = 1145472.

The previous prime is 1336343. The next prime is 1336393. The reversal of 1336391 is 1936331.

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-1336391 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1336391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1336393) 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, 95450 + ... + 95463.

It is an arithmetic number, because the mean of its divisors is an integer number (381828).

2^1336391 is an apocalyptic number.

1336391 is a deficient number, since it is larger than the sum of its proper divisors (190921).

1336391 is an equidigital number, since it uses as much as digits as its factorization.

1336391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190920.

The product of its digits is 1458, while the sum is 26.

The square root of 1336391 is about 1156.0237886826. The cubic root of 1336391 is about 110.1483123382.

The spelling of 1336391 in words is "one million, three hundred thirty-six thousand, three hundred ninety-one".