9490021 has 4 divisors (see below), whose sum is σ = 9669132. Its totient is φ = 9310912.

The previous prime is 9490009. The next prime is 9490067. The reversal of 9490021 is 1200949.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4264225 + 5225796 = 2065^2 + 2286^2 .

It is a cyclic number.

It is not a de Polignac number, because 9490021 - 2¹⁷ = 9358949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9490001) 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 3 ways as a sum of consecutive naturals, for example, 89476 + ... + 89581.

It is an arithmetic number, because the mean of its divisors is an integer number (2417283).

Almost surely, 2^9490021 is an apocalyptic number.

It is an amenable number.

9490021 is a deficient number, since it is larger than the sum of its proper divisors (179111).

9490021 is a wasteful number, since it uses less digits than its factorization.

9490021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179110.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 9490021 is about 3080.5877685922. The cubic root of 9490021 is about 211.7169965945.

The spelling of 9490021 in words is "nine million, four hundred ninety thousand, twenty-one".