1478588721 has 16 divisors (see below), whose sum is σ = 2076148800. Its totient is φ = 933424128.

The previous prime is 1478588711. The next prime is 1478588723. The reversal of 1478588721 is 1278858741.

It is not a de Polignac number, because 1478588721 - 2⁷ = 1478588593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1478588723) 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 15 ways as a sum of consecutive naturals, for example, 164865 + ... + 173601.

It is an arithmetic number, because the mean of its divisors is an integer number (129759300).

Almost surely, 2^1478588721 is an apocalyptic number.

It is an amenable number.

1478588721 is a deficient number, since it is larger than the sum of its proper divisors (597560079).

1478588721 is a wasteful number, since it uses less digits than its factorization.

1478588721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11728.

The product of its digits is 1003520, while the sum is 51.

The square root of 1478588721 is about 38452.4215232279. The cubic root of 1478588721 is about 1139.2414983651.

The spelling of 1478588721 in words is "one billion, four hundred seventy-eight million, five hundred eighty-eight thousand, seven hundred twenty-one".