9425721 has 8 divisors (see below), whose sum is σ = 12623904. Its totient is φ = 6255680.

The previous prime is 9425719. The next prime is 9425743. The reversal of 9425721 is 1275249.

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 9425721 - 2¹ = 9425719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9425771) 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, 6240 + ... + 7601.

It is an arithmetic number, because the mean of its divisors is an integer number (1577988).

Almost surely, 2^9425721 is an apocalyptic number.

It is an amenable number.

9425721 is a deficient number, since it is larger than the sum of its proper divisors (3198183).

9425721 is a wasteful number, since it uses less digits than its factorization.

9425721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14071.

The product of its digits is 5040, while the sum is 30.

The square root of 9425721 is about 3070.1337104432. The cubic root of 9425721 is about 211.2377470339.

The spelling of 9425721 in words is "nine million, four hundred twenty-five thousand, seven hundred twenty-one".