6369421 has 4 divisors (see below), whose sum is σ = 6374844. Its totient is φ = 6364000.

The previous prime is 6369409. The next prime is 6369449. The reversal of 6369421 is 1249636.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 3663396 + 2706025 = 1914^2 + 1645^2 .

It is a cyclic number.

It is not a de Polignac number, because 6369421 - 2²¹ = 4272269 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 (6369401) 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, 130 + ... + 3571.

It is an arithmetic number, because the mean of its divisors is an integer number (1593711).

Almost surely, 2^6369421 is an apocalyptic number.

It is an amenable number.

6369421 is a deficient number, since it is larger than the sum of its proper divisors (5423).

6369421 is a wasteful number, since it uses less digits than its factorization.

6369421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5422.

The product of its digits is 7776, while the sum is 31.

The square root of 6369421 is about 2523.7711861419. The cubic root of 6369421 is about 185.3673829262.

The spelling of 6369421 in words is "six million, three hundred sixty-nine thousand, four hundred twenty-one".