1128657 has 8 divisors (see below), whose sum is σ = 1584160. Its totient is φ = 712800.

The previous prime is 1128643. The next prime is 1128661. The reversal of 1128657 is 7568211.

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

It is not a de Polignac number, because 1128657 - 2⁴ = 1128641 is a prime.

It is a Duffinian number.

1128657 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1128637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9844 + ... + 9957.

It is an arithmetic number, because the mean of its divisors is an integer number (198020).

2^1128657 is an apocalyptic number.

It is an amenable number.

1128657 is a deficient number, since it is larger than the sum of its proper divisors (455503).

1128657 is a wasteful number, since it uses less digits than its factorization.

1128657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19823.

The product of its digits is 3360, while the sum is 30.

The square root of 1128657 is about 1062.3826994073. The cubic root of 1128657 is about 104.1167635812.

The spelling of 1128657 in words is "one million, one hundred twenty-eight thousand, six hundred fifty-seven".