1356091 has 16 divisors (see below), whose sum is σ = 1571328. Its totient is φ = 1159200.

The previous prime is 1356083. The next prime is 1356101. The reversal of 1356091 is 1906531.

It is a cyclic number.

It is not a de Polignac number, because 1356091 - 2³ = 1356083 is a prime.

1356091 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1356491) 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 15 ways as a sum of consecutive naturals, for example, 22201 + ... + 22261.

It is an arithmetic number, because the mean of its divisors is an integer number (98208).

2^1356091 is an apocalyptic number.

1356091 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1356091 is a deficient number, since it is larger than the sum of its proper divisors (215237).

1356091 is a wasteful number, since it uses less digits than its factorization.

1356091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162.

The product of its (nonzero) digits is 810, while the sum is 25.

The square root of 1356091 is about 1164.5132030166. The cubic root of 1356091 is about 110.6869136436.

It can be divided in two parts, 135 and 6091, that added together give a palindrome (6226).

The spelling of 1356091 in words is "one million, three hundred fifty-six thousand, ninety-one".