15484721 has 8 divisors (see below), whose sum is σ = 17721984. Its totient is φ = 13253760.

The previous prime is 15484709. The next prime is 15484723. The reversal of 15484721 is 12748451.

It is a happy number.

15484721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 15484721 - 2¹⁰ = 15483697 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15484723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6401 + ... + 8481.

It is an arithmetic number, because the mean of its divisors is an integer number (2215248).

Almost surely, 2^15484721 is an apocalyptic number.

It is an amenable number.

15484721 is a deficient number, since it is larger than the sum of its proper divisors (2237263).

15484721 is a wasteful number, since it uses less digits than its factorization.

15484721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3151.

The product of its digits is 8960, while the sum is 32.

The square root of 15484721 is about 3935.0630236376. The cubic root of 15484721 is about 249.2495951573.

The spelling of 15484721 in words is "fifteen million, four hundred eighty-four thousand, seven hundred twenty-one".