1128645 has 24 divisors (see below), whose sum is σ = 2236416. Its totient is φ = 515808.

The previous prime is 1128643. The next prime is 1128661. The reversal of 1128645 is 5468211.

1128645 is a `hidden beast` number, since 1 + 12 + 8 + 645 = 666.

It is not a de Polignac number, because 1128645 - 2¹ = 1128643 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1477 + ... + 2106.

It is an arithmetic number, because the mean of its divisors is an integer number (93184).

2^1128645 is an apocalyptic number.

1128645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128645 is a deficient number, since it is larger than the sum of its proper divisors (1107771).

1128645 is a wasteful number, since it uses less digits than its factorization.

1128645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3601 (or 3598 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 1128645 is about 1062.3770517100. The cubic root of 1128645 is about 104.1163945864.

The spelling of 1128645 in words is "one million, one hundred twenty-eight thousand, six hundred forty-five".