9401621 has 4 divisors (see below), whose sum is σ = 9408012. Its totient is φ = 9395232.

The previous prime is 9401569. The next prime is 9401627. The reversal of 9401621 is 1261049.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 4157521 + 5244100 = 2039^2 + 2290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9401621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9401627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251 + ... + 4343.

It is an arithmetic number, because the mean of its divisors is an integer number (2352003).

Almost surely, 2^9401621 is an apocalyptic number.

It is an amenable number.

9401621 is a deficient number, since it is larger than the sum of its proper divisors (6391).

9401621 is a wasteful number, since it uses less digits than its factorization.

9401621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6390.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 9401621 is about 3066.2062879069. The cubic root of 9401621 is about 211.0575601220.

The spelling of 9401621 in words is "nine million, four hundred one thousand, six hundred twenty-one".