1481728521 has 16 divisors (see below), whose sum is σ = 2431554944. Its totient is φ = 781570944.

The previous prime is 1481728481. The next prime is 1481728553. The reversal of 1481728521 is 1258271841.

It is not a de Polignac number, because 1481728521 - 2⁷ = 1481728393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 1481728521.

It is not an unprimeable number, because it can be changed into a prime (1481728571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2713516 + ... + 2714061.

It is an arithmetic number, because the mean of its divisors is an integer number (151972184).

Almost surely, 2^1481728521 is an apocalyptic number.

It is an amenable number.

1481728521 is a deficient number, since it is larger than the sum of its proper divisors (949826423).

1481728521 is a wasteful number, since it uses less digits than its factorization.

1481728521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5427600.

The product of its digits is 35840, while the sum is 39.

The square root of 1481728521 is about 38493.2269496856. The cubic root of 1481728521 is about 1140.0473256746.

The spelling of 1481728521 in words is "one billion, four hundred eighty-one million, seven hundred twenty-eight thousand, five hundred twenty-one".