1205145 has 32 divisors (see below), whose sum is σ = 2188800. Its totient is φ = 628992.

The previous prime is 1205123. The next prime is 1205159. The reversal of 1205145 is 5415021.

It is not a de Polignac number, because 1205145 - 2⁶ = 1205081 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10609 + ... + 10721.

It is an arithmetic number, because the mean of its divisors is an integer number (68400).

2^1205145 is an apocalyptic number.

1205145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1205145 is a deficient number, since it is larger than the sum of its proper divisors (983655).

1205145 is a wasteful number, since it uses less digits than its factorization.

1205145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206 (or 200 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1205145 is about 1097.7909637085. The cubic root of 1205145 is about 106.4175120044.

The spelling of 1205145 in words is "one million, two hundred five thousand, one hundred forty-five".