1145000 has 40 divisors (see below), whose sum is σ = 2694450. Its totient is φ = 456000.

The previous prime is 1144993. The next prime is 1145003. The reversal of 1145000 is 5411.

It can be written as a sum of positive squares in 5 ways, for example, as 148996 + 996004 = 386^2 + 998^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1145000² = 2622050000000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1145003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4886 + ... + 5114.

2^1145000 is an apocalyptic number.

1145000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1347225).

1145000 is an abundant number, since it is smaller than the sum of its proper divisors (1549450).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1145000 is an equidigital number, since it uses as much as digits as its factorization.

1145000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 1145000 is about 1070.0467279516. The cubic root of 1145000 is about 104.6168956618.

The spelling of 1145000 in words is "one million, one hundred forty-five thousand".