1356605 has 8 divisors (see below), whose sum is σ = 1672152. Its totient is φ = 1055808.

The previous prime is 1356599. The next prime is 1356611. The reversal of 1356605 is 5066531.

It is an interprime number because it is at equal distance from previous prime (1356599) and next prime (1356611).

It can be written as a sum of positive squares in 4 ways, for example, as 52441 + 1304164 = 229^2 + 1142^2 .

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 1356605 - 2¹⁴ = 1340221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3482 + ... + 3851.

It is an arithmetic number, because the mean of its divisors is an integer number (209019).

2^1356605 is an apocalyptic number.

It is an amenable number.

1356605 is a deficient number, since it is larger than the sum of its proper divisors (315547).

1356605 is an equidigital number, since it uses as much as digits as its factorization.

1356605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7375.

The product of its (nonzero) digits is 2700, while the sum is 26.

The square root of 1356605 is about 1164.7338751835. The cubic root of 1356605 is about 110.7008964533.

The spelling of 1356605 in words is "one million, three hundred fifty-six thousand, six hundred five".