1001205 has 24 divisors (see below), whose sum is σ = 1828320. Its totient is φ = 505440.

The previous prime is 1001197. The next prime is 1001219. The reversal of 1001205 is 5021001.

It is a happy number.

It is not a de Polignac number, because 1001205 - 2³ = 1001197 is a prime.

It is a super-2 number, since 2×1001205² = 2004822904050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 270 + ... + 1440.

It is an arithmetic number, because the mean of its divisors is an integer number (76180).

2^1001205 is an apocalyptic number.

1001205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1001205 is a deficient number, since it is larger than the sum of its proper divisors (827115).

1001205 is a wasteful number, since it uses less digits than its factorization.

1001205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 1001205 is about 1000.6023186061. The cubic root of 1001205 is about 100.0401505438.

Adding to 1001205 its reverse (5021001), we get a palindrome (6022206).

The spelling of 1001205 in words is "one million, one thousand, two hundred five".