1121845 has 8 divisors (see below), whose sum is σ = 1361880. Its totient is φ = 887040.

The previous prime is 1121839. The next prime is 1121867. The reversal of 1121845 is 5481211.

It can be written as a sum of positive squares in 4 ways, for example, as 54756 + 1067089 = 234^2 + 1033^2 .

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

It is not a de Polignac number, because 1121845 - 2³ = 1121837 is a prime.

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, 816 + ... + 1705.

It is an arithmetic number, because the mean of its divisors is an integer number (170235).

2^1121845 is an apocalyptic number.

It is an amenable number.

1121845 is a deficient number, since it is larger than the sum of its proper divisors (240035).

1121845 is an equidigital number, since it uses as much as digits as its factorization.

1121845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2615.

The product of its digits is 320, while the sum is 22.

The square root of 1121845 is about 1059.1718463026. The cubic root of 1121845 is about 103.9068754650.

The spelling of 1121845 in words is "one million, one hundred twenty-one thousand, eight hundred forty-five".