1128945 has 16 divisors (see below), whose sum is σ = 1832832. Its totient is φ = 593280.

The previous prime is 1128943. The next prime is 1128947. The reversal of 1128945 is 5498211.

1128945 = T₄₄ + T₄₅ + ... + T₁₈₉.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1128943) and next prime (1128947).

It is not a de Polignac number, because 1128945 - 2¹ = 1128943 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1128943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 580 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (114552).

2^1128945 is an apocalyptic number.

1128945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1128945 is a deficient number, since it is larger than the sum of its proper divisors (703887).

1128945 is a wasteful number, since it uses less digits than its factorization.

1128945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112.

The product of its digits is 2880, while the sum is 30.

The square root of 1128945 is about 1062.5182351376. The cubic root of 1128945 is about 104.1256186712.

The spelling of 1128945 in words is "one million, one hundred twenty-eight thousand, nine hundred forty-five".