1205055 has 24 divisors (see below), whose sum is σ = 2127840. Its totient is φ = 630720.

The previous prime is 1205047. The next prime is 1205081. The reversal of 1205055 is 5505021.

It is not a de Polignac number, because 1205055 - 2³ = 1205047 is a prime.

1205055 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2526 + ... + 2964.

It is an arithmetic number, because the mean of its divisors is an integer number (88660).

2^1205055 is an apocalyptic number.

1205055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1205055 is a deficient number, since it is larger than the sum of its proper divisors (922785).

1205055 is a wasteful number, since it uses less digits than its factorization.

1205055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 511 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 1205055 is about 1097.7499715327. The cubic root of 1205055 is about 106.4148628586.

The spelling of 1205055 in words is "one million, two hundred five thousand, fifty-five".