1355091 has 16 divisors (see below), whose sum is σ = 1935360. Its totient is φ = 841280.

The previous prime is 1355089. The next prime is 1355113. The reversal of 1355091 is 1905531.

It is a cyclic number.

It is not a de Polignac number, because 1355091 - 2¹ = 1355089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1355021) 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, 2590 + ... + 3068.

It is an arithmetic number, because the mean of its divisors is an integer number (120960).

2^1355091 is an apocalyptic number.

1355091 is a deficient number, since it is larger than the sum of its proper divisors (580269).

1355091 is a wasteful number, since it uses less digits than its factorization.

1355091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 546.

The product of its (nonzero) digits is 675, while the sum is 24.

The square root of 1355091 is about 1164.0837598730. The cubic root of 1355091 is about 110.6596996066.

The spelling of 1355091 in words is "one million, three hundred fifty-five thousand, ninety-one".