1355805 has 48 divisors (see below), whose sum is σ = 2681280. Its totient is φ = 649440.

The previous prime is 1355803. The next prime is 1355807. The reversal of 1355805 is 5085531.

It is an interprime number because it is at equal distance from previous prime (1355803) and next prime (1355807).

It is not a de Polignac number, because 1355805 - 2¹ = 1355803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355803) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16294 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (55860).

2^1355805 is an apocalyptic number.

1355805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1355805 is a deficient number, since it is larger than the sum of its proper divisors (1325475).

1355805 is a wasteful number, since it uses less digits than its factorization.

1355805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119 (or 102 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 1355805 is about 1164.3903984489. The cubic root of 1355805 is about 110.6791317954.

The spelling of 1355805 in words is "one million, three hundred fifty-five thousand, eight hundred five".