1530000 has 150 divisors (see below), whose sum is σ = 5665374. Its totient is φ = 384000.

The previous prime is 1529989. The next prime is 1530019. The reversal of 1530000 is 351.

It can be written as a sum of positive squares in 5 ways, for example, as 389376 + 1140624 = 624^2 + 1068^2 .

It is a tau number, because it is divible by the number of its divisors (150).

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 89992 + ... + 90008.

2^1530000 is an apocalyptic number.

1530000 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 1530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2832687).

1530000 is an abundant number, since it is smaller than the sum of its proper divisors (4135374).

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

1530000 is a wasteful number, since it uses less digits than its factorization.

1530000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51 (or 27 counting only the distinct ones).

The product of its (nonzero) digits is 15, while the sum is 9.

The square root of 1530000 is about 1236.9316876853. The cubic root of 1530000 is about 115.2295352511.

Adding to 1530000 its reverse (351), we get a palindrome (1530351).

The spelling of 1530000 in words is "one million, five hundred thirty thousand".