8412421 has 8 divisors (see below), whose sum is σ = 9072000. Its totient is φ = 7774560.

The previous prime is 8412409. The next prime is 8412451. The reversal of 8412421 is 1242148.

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 8412421 - 2¹⁵ = 8379653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8412392 and 8412401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8412401) 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, 4621 + ... + 6178.

It is an arithmetic number, because the mean of its divisors is an integer number (1134000).

Almost surely, 2^8412421 is an apocalyptic number.

It is an amenable number.

8412421 is a deficient number, since it is larger than the sum of its proper divisors (659579).

8412421 is a wasteful number, since it uses less digits than its factorization.

8412421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10859.

The product of its digits is 512, while the sum is 22.

The square root of 8412421 is about 2900.4173837570. The cubic root of 8412421 is about 203.3794177249.

Adding to 8412421 its reverse (1242148), we get a palindrome (9654569).

The spelling of 8412421 in words is "eight million, four hundred twelve thousand, four hundred twenty-one".