8146421 has 4 divisors (see below), whose sum is σ = 8575200. Its totient is φ = 7717644.

The previous prime is 8146409. The next prime is 8146423. The reversal of 8146421 is 1246418.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1246418 = 2 ⋅623209.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8146421 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8146423) 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, 214361 + ... + 214398.

It is an arithmetic number, because the mean of its divisors is an integer number (2143800).

Almost surely, 2^8146421 is an apocalyptic number.

It is an amenable number.

8146421 is a deficient number, since it is larger than the sum of its proper divisors (428779).

8146421 is a wasteful number, since it uses less digits than its factorization.

8146421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428778.

The product of its digits is 1536, while the sum is 26.

The square root of 8146421 is about 2854.1935813816. The cubic root of 8146421 is about 201.2128056464.

The spelling of 8146421 in words is "eight million, one hundred forty-six thousand, four hundred twenty-one".