1128001 has 8 divisors (see below), whose sum is σ = 1365120. Its totient is φ = 909888.

The previous prime is 1127993. The next prime is 1128031. The reversal of 1128001 is 1008211.

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

It is not a de Polignac number, because 1128001 - 2³ = 1127993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128031) 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, 4621 + ... + 4858.

It is an arithmetic number, because the mean of its divisors is an integer number (170640).

2^1128001 is an apocalyptic number.

It is an amenable number.

1128001 is a deficient number, since it is larger than the sum of its proper divisors (237119).

1128001 is an equidigital number, since it uses as much as digits as its factorization.

1128001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9503.

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1128001 is about 1062.0739145653. The cubic root of 1128001 is about 104.0965880293.

The spelling of 1128001 in words is "one million, one hundred twenty-eight thousand, one".