9921401 has 8 divisors (see below), whose sum is σ = 11935680. Its totient is φ = 8056368.

The previous prime is 9921391. The next prime is 9921407. The reversal of 9921401 is 1041299.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9921401 - 2⁶ = 9921337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9921407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37166 + ... + 37431.

It is an arithmetic number, because the mean of its divisors is an integer number (1491960).

Almost surely, 2^9921401 is an apocalyptic number.

It is an amenable number.

9921401 is a deficient number, since it is larger than the sum of its proper divisors (2014279).

9921401 is a wasteful number, since it uses less digits than its factorization.

9921401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74623.

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

The square root of 9921401 is about 3149.8255507250. The cubic root of 9921401 is about 214.8775289517.

The spelling of 9921401 in words is "nine million, nine hundred twenty-one thousand, four hundred one".