1128745 has 4 divisors (see below), whose sum is σ = 1354500. Its totient is φ = 902992.

The previous prime is 1128737. The next prime is 1128761. The reversal of 1128745 is 5478211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 614656 + 514089 = 784^2 + 717^2 .

It is a cyclic number.

It is not a de Polignac number, because 1128745 - 2³ = 1128737 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112870 + ... + 112879.

It is an arithmetic number, because the mean of its divisors is an integer number (338625).

2^1128745 is an apocalyptic number.

It is an amenable number.

1128745 is a deficient number, since it is larger than the sum of its proper divisors (225755).

1128745 is an equidigital number, since it uses as much as digits as its factorization.

1128745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225754.

The product of its digits is 2240, while the sum is 28.

The square root of 1128745 is about 1062.4241149372. The cubic root of 1128745 is about 104.1194694629.

The spelling of 1128745 in words is "one million, one hundred twenty-eight thousand, seven hundred forty-five".