1521485573 has 4 divisors (see below), whose sum is σ = 1528015788. Its totient is φ = 1514955360.

The previous prime is 1521485531. The next prime is 1521485579. The reversal of 1521485573 is 3755841251.

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 774119329 + 747366244 = 27823^2 + 27338^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521485573 - 2⁶ = 1521485509 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1521485573.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1521485579) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3264758 + ... + 3265223.

It is an arithmetic number, because the mean of its divisors is an integer number (382003947).

Almost surely, 2^1521485573 is an apocalyptic number.

It is an amenable number.

1521485573 is a deficient number, since it is larger than the sum of its proper divisors (6530215).

1521485573 is an equidigital number, since it uses as much as digits as its factorization.

1521485573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530214.

The product of its digits is 168000, while the sum is 41.

The square root of 1521485573 is about 39006.2247981011. The cubic root of 1521485573 is about 1150.1538730463.

The spelling of 1521485573 in words is "one billion, five hundred twenty-one million, four hundred eighty-five thousand, five hundred seventy-three".