1128405 has 8 divisors (see below), whose sum is σ = 1805472. Its totient is φ = 601808.

The previous prime is 1128397. The next prime is 1128427. The reversal of 1128405 is 5048211.

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 1128405 - 2³ = 1128397 is a prime.

It is a Curzon number.

1128405 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37599 + ... + 37628.

It is an arithmetic number, because the mean of its divisors is an integer number (225684).

2^1128405 is an apocalyptic number.

1128405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128405 is a deficient number, since it is larger than the sum of its proper divisors (677067).

1128405 is an equidigital number, since it uses as much as digits as its factorization.

1128405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75235.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 1128405 is about 1062.2640914575. The cubic root of 1128405 is about 104.1090141417.

The spelling of 1128405 in words is "one million, one hundred twenty-eight thousand, four hundred five".