1391133 has 4 divisors (see below), whose sum is σ = 1854848. Its totient is φ = 927420.

The previous prime is 1391129. The next prime is 1391183. The reversal of 1391133 is 3311931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1391133 - 2² = 1391129 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391113) 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, 231853 + ... + 231858.

It is an arithmetic number, because the mean of its divisors is an integer number (463712).

2^1391133 is an apocalyptic number.

It is an amenable number.

1391133 is a deficient number, since it is larger than the sum of its proper divisors (463715).

1391133 is an equidigital number, since it uses as much as digits as its factorization.

1391133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463714.

The product of its digits is 243, while the sum is 21.

The square root of 1391133 is about 1179.4630134091. The cubic root of 1391133 is about 111.6322172885.

The spelling of 1391133 in words is "one million, three hundred ninety-one thousand, one hundred thirty-three".