1145872 has 40 divisors (see below), whose sum is σ = 2735936. Its totient is φ = 452736.

The previous prime is 1145849. The next prime is 1145873. The reversal of 1145872 is 2785411.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 1145872.

It is not an unprimeable number, because it can be changed into a prime (1145873) 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, 1063 + ... + 1849.

2^1145872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1145872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1367968).

1145872 is an abundant number, since it is smaller than the sum of its proper divisors (1590064).

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

1145872 is a wasteful number, since it uses less digits than its factorization.

1145872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815 (or 809 counting only the distinct ones).

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

The square root of 1145872 is about 1070.4541092452. The cubic root of 1145872 is about 104.6434466907.

The spelling of 1145872 in words is "one million, one hundred forty-five thousand, eight hundred seventy-two".