9472921 has 4 divisors (see below), whose sum is σ = 9495844. Its totient is φ = 9450000.

The previous prime is 9472913. The next prime is 9472951. The reversal of 9472921 is 1292749.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1292749 = 59 ⋅21911.

It can be written as a sum of positive squares in 2 ways, for example, as 4999696 + 4473225 = 2236^2 + 2115^2 .

It is a cyclic number.

It is not a de Polignac number, because 9472921 - 2³ = 9472913 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9472901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10830 + ... + 11671.

It is an arithmetic number, because the mean of its divisors is an integer number (2373961).

Almost surely, 2^9472921 is an apocalyptic number.

It is an amenable number.

9472921 is a deficient number, since it is larger than the sum of its proper divisors (22923).

9472921 is a wasteful number, since it uses less digits than its factorization.

9472921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22922.

The product of its digits is 9072, while the sum is 34.

The square root of 9472921 is about 3077.8110728243. The cubic root of 9472921 is about 211.5897563660.

The spelling of 9472921 in words is "nine million, four hundred seventy-two thousand, nine hundred twenty-one".