1500728573 has 4 divisors (see below), whose sum is σ = 1504752348. Its totient is φ = 1496704800.

The previous prime is 1500728531. The next prime is 1500728597. The reversal of 1500728573 is 3758270051.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 884348644 + 616379929 = 29738^2 + 24827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1500728573 - 2¹⁴ = 1500712189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1500728503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011328 + ... + 2012073.

It is an arithmetic number, because the mean of its divisors is an integer number (376188087).

Almost surely, 2^1500728573 is an apocalyptic number.

It is an amenable number.

1500728573 is a deficient number, since it is larger than the sum of its proper divisors (4023775).

1500728573 is an equidigital number, since it uses as much as digits as its factorization.

1500728573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4023774.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 1500728573 is about 38739.2381571966. The cubic root of 1500728573 is about 1144.8995476414.

The spelling of 1500728573 in words is "one billion, five hundred million, seven hundred twenty-eight thousand, five hundred seventy-three".