1205155 has 12 divisors (see below), whose sum is σ = 1682640. Its totient is φ = 826224.

The previous prime is 1205123. The next prime is 1205159. The reversal of 1205155 is 5515021.

It is not a de Polignac number, because 1205155 - 2⁵ = 1205123 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2215 + ... + 2704.

It is an arithmetic number, because the mean of its divisors is an integer number (140220).

2^1205155 is an apocalyptic number.

1205155 is a deficient number, since it is larger than the sum of its proper divisors (477485).

1205155 is an equidigital number, since it uses as much as digits as its factorization.

1205155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4938 (or 4931 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 1205155 is about 1097.7955183002. The cubic root of 1205155 is about 106.4178063458.

The spelling of 1205155 in words is "one million, two hundred five thousand, one hundred fifty-five".