1355023 has 4 divisors (see below), whose sum is σ = 1426360. Its totient is φ = 1283688.

The previous prime is 1355021. The next prime is 1355047. The reversal of 1355023 is 3205531.

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 1355023 - 2¹ = 1355021 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 71317 = 1355023 / (1 + 3 + 5 + 5 + 0 + 2 + 3).

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 35640 + ... + 35677.

It is an arithmetic number, because the mean of its divisors is an integer number (356590).

2^1355023 is an apocalyptic number.

1355023 is a deficient number, since it is larger than the sum of its proper divisors (71337).

1355023 is an equidigital number, since it uses as much as digits as its factorization.

1355023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71336.

The product of its (nonzero) digits is 450, while the sum is 19.

The square root of 1355023 is about 1164.0545519863. The cubic root of 1355023 is about 110.6578485659.

1355023 divided by its sum of digits (19) gives a palindrome (71317).

The spelling of 1355023 in words is "one million, three hundred fifty-five thousand, twenty-three".