1205555 has 16 divisors (see below), whose sum is σ = 1651104. Its totient is φ = 837120.

The previous prime is 1205549. The next prime is 1205557. The reversal of 1205555 is 5555021.

It is not a de Polignac number, because 1205555 - 2⁴ = 1205539 is a prime.

1205555 is a modest number, since divided by 5555 gives 120 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 1205555.

It is not an unprimeable number, because it can be changed into a prime (1205557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 560 + ... + 1650.

It is an arithmetic number, because the mean of its divisors is an integer number (103194).

2^1205555 is an apocalyptic number.

1205555 is a deficient number, since it is larger than the sum of its proper divisors (445549).

1205555 is a wasteful number, since it uses less digits than its factorization.

1205555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 1205555 is about 1097.9776864764. The cubic root of 1205555 is about 106.4295786667.

The spelling of 1205555 in words is "one million, two hundred five thousand, five hundred fifty-five".