1530520 has 32 divisors (see below), whose sum is σ = 3492720. Its totient is φ = 603520.

The previous prime is 1530517. The next prime is 1530521. The reversal of 1530520 is 250351.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 1530494 and 1530503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1530521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3090 + ... + 3550.

2^1530520 is an apocalyptic number.

1530520 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 1530520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1746360).

1530520 is an abundant number, since it is smaller than the sum of its proper divisors (1962200).

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

1530520 is a wasteful number, since it uses less digits than its factorization.

1530520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555 (or 551 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 1530520 is about 1237.1418673701. The cubic root of 1530520 is about 115.2425880989.

Adding to 1530520 its reverse (250351), we get a palindrome (1780871).

The spelling of 1530520 in words is "one million, five hundred thirty thousand, five hundred twenty".