9406521 has 12 divisors (see below), whose sum is σ = 13616148. Its totient is φ = 6257664.

The previous prime is 9406513. The next prime is 9406541. The reversal of 9406521 is 1256049.

9406521 is a `hidden beast` number, since 9 + 4 + 0 + 652 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1904400 + 7502121 = 1380^2 + 2739^2 .

It is not a de Polignac number, because 9406521 - 2³ = 9406513 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9406511) 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 11 ways as a sum of consecutive naturals, for example, 5281 + ... + 6833.

It is an arithmetic number, because the mean of its divisors is an integer number (1134679).

Almost surely, 2^9406521 is an apocalyptic number.

It is an amenable number.

9406521 is a deficient number, since it is larger than the sum of its proper divisors (4209627).

9406521 is a wasteful number, since it uses less digits than its factorization.

9406521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2232 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 9406521 is about 3067.0052168198. The cubic root of 9406521 is about 211.0942205528.

The spelling of 9406521 in words is "nine million, four hundred six thousand, five hundred twenty-one".