1355491 has 4 divisors (see below), whose sum is σ = 1360800. Its totient is φ = 1350184.

The previous prime is 1355483. The next prime is 1355503. The reversal of 1355491 is 1945531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1355491 - 2³ = 1355483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1355401) 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, 2251 + ... + 2788.

It is an arithmetic number, because the mean of its divisors is an integer number (340200).

2^1355491 is an apocalyptic number.

1355491 is a deficient number, since it is larger than the sum of its proper divisors (5309).

1355491 is an equidigital number, since it uses as much as digits as its factorization.

1355491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5308.

The product of its digits is 2700, while the sum is 28.

The square root of 1355491 is about 1164.2555561388. The cubic root of 1355491 is about 110.6705868275.

The spelling of 1355491 in words is "one million, three hundred fifty-five thousand, four hundred ninety-one".