6419421 has 12 divisors (see below), whose sum is σ = 9818172. Its totient is φ = 4027776.

The previous prime is 6419419. The next prime is 6419423. The reversal of 6419421 is 1249146.

It is an interprime number because it is at equal distance from previous prime (6419419) and next prime (6419423).

It can be written as a sum of positive squares in 2 ways, for example, as 4284900 + 2134521 = 2070^2 + 1461^2 .

It is not a de Polignac number, because 6419421 - 2¹ = 6419419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6419423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20826 + ... + 21131.

It is an arithmetic number, because the mean of its divisors is an integer number (818181).

Almost surely, 2^6419421 is an apocalyptic number.

It is an amenable number.

6419421 is a deficient number, since it is larger than the sum of its proper divisors (3398751).

6419421 is a wasteful number, since it uses less digits than its factorization.

6419421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41980 (or 41977 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 6419421 is about 2533.6576327515. The cubic root of 6419421 is about 185.8511643200.

The spelling of 6419421 in words is "six million, four hundred nineteen thousand, four hundred twenty-one".