1153530 has 48 divisors (see below), whose sum is σ = 3429504. Its totient is φ = 263520.

The previous prime is 1153517. The next prime is 1153531. The reversal of 1153530 is 353511.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (1153531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 286 + ... + 1545.

It is an arithmetic number, because the mean of its divisors is an integer number (71448).

2^1153530 is an apocalyptic number.

1153530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1153530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1714752).

1153530 is an abundant number, since it is smaller than the sum of its proper divisors (2275974).

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

1153530 is a wasteful number, since it uses less digits than its factorization.

1153530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851 (or 1848 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 1153530 is about 1074.0251393706. The cubic root of 1153530 is about 104.8760442001.

The spelling of 1153530 in words is "one million, one hundred fifty-three thousand, five hundred thirty".