1530540 has 72 divisors (see below), whose sum is σ = 5071248. Its totient is φ = 370560.

The previous prime is 1530539. The next prime is 1530541. The reversal of 1530540 is 450351.

It is an interprime number because it is at equal distance from previous prime (1530539) and next prime (1530541).

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 (1530541) 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, 1594 + ... + 2366.

It is an arithmetic number, because the mean of its divisors is an integer number (70434).

2^1530540 is an apocalyptic number.

1530540 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 1530540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2535624).

1530540 is an abundant number, since it is smaller than the sum of its proper divisors (3540708).

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

1530540 is a wasteful number, since it uses less digits than its factorization.

1530540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799 (or 794 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 1530540 is about 1237.1499504910. The cubic root of 1530540 is about 115.2430900725.

Adding to 1530540 its reverse (450351), we get a palindrome (1980891).

The spelling of 1530540 in words is "one million, five hundred thirty thousand, five hundred forty".