8915421 has 8 divisors (see below), whose sum is σ = 12404160. Its totient is φ = 5685152.

The previous prime is 8915419. The next prime is 8915443. The reversal of 8915421 is 1245198.

It is a happy number.

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 8915421 - 2¹ = 8915419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8915411) 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, 64536 + ... + 64673.

It is an arithmetic number, because the mean of its divisors is an integer number (1550520).

Almost surely, 2^8915421 is an apocalyptic number.

It is an amenable number.

8915421 is a deficient number, since it is larger than the sum of its proper divisors (3488739).

8915421 is a wasteful number, since it uses less digits than its factorization.

8915421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129235.

The product of its digits is 2880, while the sum is 30.

The square root of 8915421 is about 2985.8702249093. The cubic root of 8915421 is about 207.3547326012.

The spelling of 8915421 in words is "eight million, nine hundred fifteen thousand, four hundred twenty-one".