9478521 has 12 divisors (see below), whose sum is σ = 14744548. Its totient is φ = 5832864.

The previous prime is 9478487. The next prime is 9478541. The reversal of 9478521 is 1258749.

9478521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 746496 + 8732025 = 864^2 + 2955^2 .

It is not a de Polignac number, because 9478521 - 2⁶ = 9478457 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (9478541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40390 + ... + 40623.

Almost surely, 2^9478521 is an apocalyptic number.

It is an amenable number.

9478521 is a deficient number, since it is larger than the sum of its proper divisors (5266027).

9478521 is a wasteful number, since it uses less digits than its factorization.

9478521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81032 (or 81029 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 9478521 is about 3078.7206758652. The cubic root of 9478521 is about 211.6314425303.

It can be divided in two parts, 9478 and 521, that added together give a palindrome (9999).

The spelling of 9478521 in words is "nine million, four hundred seventy-eight thousand, five hundred twenty-one".