1145520 has 120 divisors (see below), whose sum is σ = 4042896. Its totient is φ = 290304.

The previous prime is 1145509. The next prime is 1145533. The reversal of 1145520 is 255411.

1145520 is a `hidden beast` number, since 1 + 145 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1145493 and 1145502.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26619 + ... + 26661.

2^1145520 is an apocalyptic number.

1145520 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 1145520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2021448).

1145520 is an abundant number, since it is smaller than the sum of its proper divisors (2897376).

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

1145520 is a wasteful number, since it uses less digits than its factorization.

1145520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 1145520 is about 1070.2896804137. The cubic root of 1145520 is about 104.6327304660.

The spelling of 1145520 in words is "one million, one hundred forty-five thousand, five hundred twenty".