1205955 has 16 divisors (see below), whose sum is σ = 2144160. Its totient is φ = 643104.

The previous prime is 1205951. The next prime is 1205969. The reversal of 1205955 is 5595021.

It is not a de Polignac number, because 1205955 - 2² = 1205951 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1205951) 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, 4332 + ... + 4601.

It is an arithmetic number, because the mean of its divisors is an integer number (134010).

2^1205955 is an apocalyptic number.

1205955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1205955 is a deficient number, since it is larger than the sum of its proper divisors (938205).

1205955 is an equidigital number, since it uses as much as digits as its factorization.

1205955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8947 (or 8941 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 27.

The square root of 1205955 is about 1098.1598244336. The cubic root of 1205955 is about 106.4413483838.

The spelling of 1205955 in words is "one million, two hundred five thousand, nine hundred fifty-five".