8629421 has 8 divisors (see below), whose sum is σ = 9222840. Its totient is φ = 8045568.

The previous prime is 8629409. The next prime is 8629429. The reversal of 8629421 is 1249268.

8629421 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 4 ways, for example, as 1473796 + 7155625 = 1214^2 + 2675^2 .

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 8629421 - 2²² = 4435117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8629429) 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, 476 + ... + 4181.

It is an arithmetic number, because the mean of its divisors is an integer number (1152855).

Almost surely, 2^8629421 is an apocalyptic number.

It is an amenable number.

8629421 is a deficient number, since it is larger than the sum of its proper divisors (593419).

8629421 is a wasteful number, since it uses less digits than its factorization.

8629421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4783.

The product of its digits is 6912, while the sum is 32.

The square root of 8629421 is about 2937.5876157146. The cubic root of 8629421 is about 205.1133301579.

The spelling of 8629421 in words is "eight million, six hundred twenty-nine thousand, four hundred twenty-one".