1355791 has 4 divisors (see below), whose sum is σ = 1392472. Its totient is φ = 1319112.

The previous prime is 1355777. The next prime is 1355803. The reversal of 1355791 is 1975531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1975531 = 157 ⋅12583.

It is a cyclic number.

It is not a de Polignac number, because 1355791 - 2⁵ = 1355759 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 (1355741) 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, 18285 + ... + 18358.

It is an arithmetic number, because the mean of its divisors is an integer number (348118).

2^1355791 is an apocalyptic number.

1355791 is a deficient number, since it is larger than the sum of its proper divisors (36681).

1355791 is an equidigital number, since it uses as much as digits as its factorization.

1355791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36680.

The product of its digits is 4725, while the sum is 31.

The square root of 1355791 is about 1164.3843867040. The cubic root of 1355791 is about 110.6787508377.

The spelling of 1355791 in words is "one million, three hundred fifty-five thousand, seven hundred ninety-one".