10643421 has 8 divisors (see below), whose sum is σ = 14351040. Its totient is φ = 7015712.

The previous prime is 10643417. The next prime is 10643431. The reversal of 10643421 is 12434601.

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 10643421 - 2² = 10643417 is a prime.

It is a super-2 number, since 2×10643421² = 226564821166482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10643431) 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, 19665 + ... + 20198.

It is an arithmetic number, because the mean of its divisors is an integer number (1793880).

Almost surely, 2^10643421 is an apocalyptic number.

It is an amenable number.

10643421 is a deficient number, since it is larger than the sum of its proper divisors (3707619).

10643421 is an equidigital number, since it uses as much as digits as its factorization.

10643421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39955.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 10643421 is about 3262.4256313363. The cubic root of 10643421 is about 219.9684596658.

The spelling of 10643421 in words is "ten million, six hundred forty-three thousand, four hundred twenty-one".