1355605 has 8 divisors (see below), whose sum is σ = 1683000. Its totient is φ = 1046976.

The previous prime is 1355591. The next prime is 1355609. The reversal of 1355605 is 5065531.

It can be written as a sum of positive squares in 4 ways, for example, as 357604 + 998001 = 598^2 + 999^2 .

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 1355605 - 2⁵ = 1355573 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1355605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1355609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4530 + ... + 4819.

It is an arithmetic number, because the mean of its divisors is an integer number (210375).

2^1355605 is an apocalyptic number.

It is an amenable number.

1355605 is a deficient number, since it is larger than the sum of its proper divisors (327395).

1355605 is an equidigital number, since it uses as much as digits as its factorization.

1355605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9383.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 1355605 is about 1164.3045134328. The cubic root of 1355605 is about 110.6736892932.

The spelling of 1355605 in words is "one million, three hundred fifty-five thousand, six hundred five".