6471421 has 4 divisors (see below), whose sum is σ = 7059744. Its totient is φ = 5883100.

The previous prime is 6471401. The next prime is 6471431. The reversal of 6471421 is 1241746.

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 6471421 - 2¹¹ = 6469373 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 (6471401) 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, 294145 + ... + 294166.

It is an arithmetic number, because the mean of its divisors is an integer number (1764936).

Almost surely, 2^6471421 is an apocalyptic number.

It is an amenable number.

6471421 is a deficient number, since it is larger than the sum of its proper divisors (588323).

6471421 is a wasteful number, since it uses less digits than its factorization.

6471421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588322.

The product of its digits is 1344, while the sum is 25.

The square root of 6471421 is about 2543.8987794329. The cubic root of 6471421 is about 186.3516394924.

The spelling of 6471421 in words is "six million, four hundred seventy-one thousand, four hundred twenty-one".