9425821 has 4 divisors (see below), whose sum is σ = 9456832. Its totient is φ = 9394812.

The previous prime is 9425797. The next prime is 9425827. The reversal of 9425821 is 1285249.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 9425821 - 2⁵ = 9425789 is a prime.

It is a super-2 number, since 2×9425821² = 177692203048082, which contains 22 as substring.

It is a Duffinian number.

9425821 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9425827) 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, 15045 + ... + 15658.

It is an arithmetic number, because the mean of its divisors is an integer number (2364208).

Almost surely, 2^9425821 is an apocalyptic number.

It is an amenable number.

9425821 is a deficient number, since it is larger than the sum of its proper divisors (31011).

9425821 is a wasteful number, since it uses less digits than its factorization.

9425821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31010.

The product of its digits is 5760, while the sum is 31.

The square root of 9425821 is about 3070.1499963357. The cubic root of 9425821 is about 211.2384940572.

The spelling of 9425821 in words is "nine million, four hundred twenty-five thousand, eight hundred twenty-one".