1121205 has 8 divisors (see below), whose sum is σ = 1793952. Its totient is φ = 597968.

The previous prime is 1121203. The next prime is 1121221. The reversal of 1121205 is 5021211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1121205 - 2¹ = 1121203 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37359 + ... + 37388.

It is an arithmetic number, because the mean of its divisors is an integer number (224244).

2^1121205 is an apocalyptic number.

1121205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1121205 is a deficient number, since it is larger than the sum of its proper divisors (672747).

1121205 is an equidigital number, since it uses as much as digits as its factorization.

1121205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74755.

The product of its (nonzero) digits is 20, while the sum is 12.

The square root of 1121205 is about 1058.8696803668. The cubic root of 1121205 is about 103.8871124703.

Adding to 1121205 its reverse (5021211), we get a palindrome (6142416).

It can be divided in two parts, 1121 and 205, that added together give a triangular number (1326 = T₅₁).

The spelling of 1121205 in words is "one million, one hundred twenty-one thousand, two hundred five".