1355005 has 8 divisors (see below), whose sum is σ = 1632312. Its totient is φ = 1079808.

The previous prime is 1354987. The next prime is 1355021. The reversal of 1355005 is 5005531.

It can be written as a sum of positive squares in 4 ways, for example, as 412164 + 942841 = 642^2 + 971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1355005 - 2⁷ = 1354877 is a prime.

It is a Duffinian number.

1355005 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1989 + ... + 2581.

It is an arithmetic number, because the mean of its divisors is an integer number (204039).

2^1355005 is an apocalyptic number.

It is an amenable number.

1355005 is a deficient number, since it is larger than the sum of its proper divisors (277307).

1355005 is an equidigital number, since it uses as much as digits as its factorization.

1355005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1055.

The product of its (nonzero) digits is 375, while the sum is 19.

The square root of 1355005 is about 1164.0468203642. The cubic root of 1355005 is about 110.6573585742.

The spelling of 1355005 in words is "one million, three hundred fifty-five thousand, five".