9601821 has 40 divisors (see below), whose sum is σ = 16030080. Its totient is φ = 5692032.

The previous prime is 9601819. The next prime is 9601829. The reversal of 9601821 is 1281069.

It is not a de Polignac number, because 9601821 - 2¹ = 9601819 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9601829) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 25980 + ... + 26346.

It is an arithmetic number, because the mean of its divisors is an integer number (400752).

Almost surely, 2^9601821 is an apocalyptic number.

It is an amenable number.

9601821 is a deficient number, since it is larger than the sum of its proper divisors (6428259).

9601821 is a wasteful number, since it uses less digits than its factorization.

9601821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415 (or 406 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 9601821 is about 3098.6805256431. The cubic root of 9601821 is about 212.5451511901.

The spelling of 9601821 in words is "nine million, six hundred one thousand, eight hundred twenty-one".