1205355 has 16 divisors (see below), whose sum is σ = 1949184. Its totient is φ = 636000.

The previous prime is 1205339. The next prime is 1205377. The reversal of 1205355 is 5535021.

It is not a de Polignac number, because 1205355 - 2⁴ = 1205339 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1230 + ... + 1980.

It is an arithmetic number, because the mean of its divisors is an integer number (121824).

2^1205355 is an apocalyptic number.

1205355 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1205355 is a deficient number, since it is larger than the sum of its proper divisors (743829).

1205355 is a wasteful number, since it uses less digits than its factorization.

1205355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866.

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 1205355 is about 1097.8866061666. The cubic root of 1205355 is about 106.4236928318.

The spelling of 1205355 in words is "one million, two hundred five thousand, three hundred fifty-five".