1128565 has 8 divisors (see below), whose sum is σ = 1365408. Its totient is φ = 895440.

The previous prime is 1128557. The next prime is 1128577. The reversal of 1128565 is 5658211.

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

It is not a de Polignac number, because 1128565 - 2³ = 1128557 is a prime.

It is a Duffinian number.

1128565 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, 207 + ... + 1516.

It is an arithmetic number, because the mean of its divisors is an integer number (170676).

2^1128565 is an apocalyptic number.

It is an amenable number.

1128565 is a deficient number, since it is larger than the sum of its proper divisors (236843).

1128565 is a wasteful number, since it uses less digits than its factorization.

1128565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1859.

The product of its digits is 2400, while the sum is 28.

The square root of 1128565 is about 1062.3393996271. The cubic root of 1128565 is about 104.1139345545.

The spelling of 1128565 in words is "one million, one hundred twenty-eight thousand, five hundred sixty-five".