1591355 has 4 divisors (see below), whose sum is σ = 1909632. Its totient is φ = 1273080.

The previous prime is 1591351. The next prime is 1591363. The reversal of 1591355 is 5531951.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5531951 = 733 ⋅7547.

It is not a de Polignac number, because 1591355 - 2² = 1591351 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1591351) 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, 159131 + ... + 159140.

It is an arithmetic number, because the mean of its divisors is an integer number (477408).

2^1591355 is an apocalyptic number.

1591355 is a deficient number, since it is larger than the sum of its proper divisors (318277).

1591355 is an equidigital number, since it uses as much as digits as its factorization.

1591355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318276.

The product of its digits is 3375, while the sum is 29.

The square root of 1591355 is about 1261.4891993196. The cubic root of 1591355 is about 116.7496778829.

The spelling of 1591355 in words is "one million, five hundred ninety-one thousand, three hundred fifty-five".