9164421 has 30 divisors (see below), whose sum is σ = 15932070. Its totient is φ = 5234544.

The previous prime is 9164417. The next prime is 9164423. The reversal of 9164421 is 1244619.

9164421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8767521 + 396900 = 2961^2 + 630^2 .

It is not a de Polignac number, because 9164421 - 2² = 9164417 is a prime.

It is a super-2 number, since 2×9164421² = 167973224530482, which contains 22 as substring.

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 (9164423) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 2815 + ... + 5123.

It is an arithmetic number, because the mean of its divisors is an integer number (531069).

Almost surely, 2^9164421 is an apocalyptic number.

It is an amenable number.

9164421 is a deficient number, since it is larger than the sum of its proper divisors (6767649).

9164421 is a wasteful number, since it uses less digits than its factorization.

9164421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2335 (or 2319 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 9164421 is about 3027.2794717370. The cubic root of 9164421 is about 209.2674475759.

The spelling of 9164421 in words is "nine million, one hundred sixty-four thousand, four hundred twenty-one".