1128457 has 4 divisors (see below), whose sum is σ = 1231056. Its totient is φ = 1025860.

The previous prime is 1128451. The next prime is 1128497. The reversal of 1128457 is 7548211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7548211 = 11 ⋅686201.

It is a de Polignac number, because none of the positive numbers 2^k-1128457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1128451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51283 + ... + 51304.

It is an arithmetic number, because the mean of its divisors is an integer number (307764).

2^1128457 is an apocalyptic number.

It is an amenable number.

1128457 is a deficient number, since it is larger than the sum of its proper divisors (102599).

1128457 is a wasteful number, since it uses less digits than its factorization.

1128457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102598.

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

The square root of 1128457 is about 1062.2885671982. The cubic root of 1128457 is about 104.1106133269.

The spelling of 1128457 in words is "one million, one hundred twenty-eight thousand, four hundred fifty-seven".