8946421 has 4 divisors (see below), whose sum is σ = 9759744. Its totient is φ = 8133100.

The previous prime is 8946409. The next prime is 8946449. The reversal of 8946421 is 1246498.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8946421 - 2⁷ = 8946293 is a prime.

It is a Duffinian number.

8946421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8946481) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406645 + ... + 406666.

It is an arithmetic number, because the mean of its divisors is an integer number (2439936).

Almost surely, 2^8946421 is an apocalyptic number.

It is an amenable number.

8946421 is a deficient number, since it is larger than the sum of its proper divisors (813323).

8946421 is a wasteful number, since it uses less digits than its factorization.

8946421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813322.

The product of its digits is 13824, while the sum is 34.

The square root of 8946421 is about 2991.0568366382. The cubic root of 8946421 is about 207.5947871001.

The spelling of 8946421 in words is "eight million, nine hundred forty-six thousand, four hundred twenty-one".