9401921 has 2 divisors, whose sum is σ = 9401922. Its totient is φ = 9401920.

The previous prime is 9401881. The next prime is 9401947. The reversal of 9401921 is 1291049.

9401921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (9401947) can be obtained adding 9401921 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6071296 + 3330625 = 2464^2 + 1825^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9401921 is a prime.

It is a super-2 number, since 2×9401921² = 176792236980482, which contains 22 as substring.

It is a Chen prime.

It is equal to p₆₂₇₅₁₅ and since 9401921 and 627515 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (9401981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4700960 + 4700961.

It is an arithmetic number, because the mean of its divisors is an integer number (4700961).

Almost surely, 2^9401921 is an apocalyptic number.

It is an amenable number.

9401921 is a deficient number, since it is larger than the sum of its proper divisors (1).

9401921 is an equidigital number, since it uses as much as digits as its factorization.

9401921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 9401921 is about 3066.2552079043. The cubic root of 9401921 is about 211.0598050042.

The spelling of 9401921 in words is "nine million, four hundred one thousand, nine hundred twenty-one".