6171421 has 4 divisors (see below), whose sum is σ = 6191452. Its totient is φ = 6151392.

The previous prime is 6171413. The next prime is 6171427. The reversal of 6171421 is 1241716.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168921 + 6002500 = 411^2 + 2450^2 .

It is a cyclic number.

It is not a de Polignac number, because 6171421 - 2³ = 6171413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6171392 and 6171401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6171427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9546 + ... + 10171.

It is an arithmetic number, because the mean of its divisors is an integer number (1547863).

Almost surely, 2^6171421 is an apocalyptic number.

It is an amenable number.

6171421 is a deficient number, since it is larger than the sum of its proper divisors (20031).

6171421 is a wasteful number, since it uses less digits than its factorization.

6171421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20030.

The product of its digits is 336, while the sum is 22.

The square root of 6171421 is about 2484.2344897372. The cubic root of 6171421 is about 183.4263502273.

The spelling of 6171421 in words is "six million, one hundred seventy-one thousand, four hundred twenty-one".