1530240 has 64 divisors (see below), whose sum is σ = 4883760. Its totient is φ = 407552.

The previous prime is 1530233. The next prime is 1530281. The reversal of 1530240 is 420351.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1522 + ... + 2318.

2^1530240 is an apocalyptic number.

1530240 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 1530240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2441880).

1530240 is an abundant number, since it is smaller than the sum of its proper divisors (3353520).

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

1530240 is an equidigital number, since it uses as much as digits as its factorization.

1530240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 819 (or 807 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 1530240 is about 1237.0286981311. The cubic root of 1530240 is about 115.2355600098.

Adding to 1530240 its reverse (420351), we get a palindrome (1950591).

It can be divided in two parts, 1530 and 240, that added together give a triangular number (1770 = T₅₉).

The spelling of 1530240 in words is "one million, five hundred thirty thousand, two hundred forty".