1356791 has 4 divisors (see below), whose sum is σ = 1368912. Its totient is φ = 1344672.

The previous prime is 1356763. The next prime is 1356811. The reversal of 1356791 is 1976531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1976531 = 719 ⋅2749.

It is a cyclic number.

It is not a de Polignac number, because 1356791 - 2⁶ = 1356727 is a prime.

It is an Ulam 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 (1356721) 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, 5891 + ... + 6116.

It is an arithmetic number, because the mean of its divisors is an integer number (342228).

2^1356791 is an apocalyptic number.

1356791 is a deficient number, since it is larger than the sum of its proper divisors (12121).

1356791 is a wasteful number, since it uses less digits than its factorization.

1356791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12120.

The product of its digits is 5670, while the sum is 32.

The square root of 1356791 is about 1164.8137190126. The cubic root of 1356791 is about 110.7059555102.

The spelling of 1356791 in words is "one million, three hundred fifty-six thousand, seven hundred ninety-one".