1530723 has 4 divisors (see below), whose sum is σ = 2040968. Its totient is φ = 1020480.

The previous prime is 1530721. The next prime is 1530779. The reversal of 1530723 is 3270351.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1530723 - 2¹ = 1530721 is a prime.

It is a super-2 number, since 2×1530723² = 4686225805458, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1530723.

It is not an unprimeable number, because it can be changed into a prime (1530721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255118 + ... + 255123.

It is an arithmetic number, because the mean of its divisors is an integer number (510242).

2^1530723 is an apocalyptic number.

1530723 is a deficient number, since it is larger than the sum of its proper divisors (510245).

1530723 is an equidigital number, since it uses as much as digits as its factorization.

1530723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510244.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 1530723 is about 1237.2239085954. The cubic root of 1530723 is about 115.2476829275.

The spelling of 1530723 in words is "one million, five hundred thirty thousand, seven hundred twenty-three".