1122405 has 8 divisors (see below), whose sum is σ = 1795872. Its totient is φ = 598608.

The previous prime is 1122397. The next prime is 1122419. The reversal of 1122405 is 5042211.

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

It is not a de Polignac number, because 1122405 - 2³ = 1122397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 74827 = 1122405 / (1 + 1 + 2 + 2 + 4 + 0 + 5).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37399 + ... + 37428.

It is an arithmetic number, because the mean of its divisors is an integer number (224484).

2^1122405 is an apocalyptic number.

1122405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1122405 is a deficient number, since it is larger than the sum of its proper divisors (673467).

1122405 is an equidigital number, since it uses as much as digits as its factorization.

1122405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74835.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 1122405 is about 1059.4361708003. The cubic root of 1122405 is about 103.9241619205.

Adding to 1122405 its reverse (5042211), we get a palindrome (6164616).

The spelling of 1122405 in words is "one million, one hundred twenty-two thousand, four hundred five".