5991421 has 8 divisors (see below), whose sum is σ = 6108984. Its totient is φ = 5875200.

The previous prime is 5991413. The next prime is 5991443. The reversal of 5991421 is 1241995.

It can be written as a sum of positive squares in 4 ways, for example, as 1416100 + 4575321 = 1190^2 + 2139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5991421 - 2³ = 5991413 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 (5991451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13621 + ... + 14053.

It is an arithmetic number, because the mean of its divisors is an integer number (763623).

Almost surely, 2^5991421 is an apocalyptic number.

It is an amenable number.

5991421 is a deficient number, since it is larger than the sum of its proper divisors (117563).

5991421 is a wasteful number, since it uses less digits than its factorization.

5991421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671.

The product of its digits is 3240, while the sum is 31.

The square root of 5991421 is about 2447.7379353191. The cubic root of 5991421 is about 181.6254119865.

The spelling of 5991421 in words is "five million, nine hundred ninety-one thousand, four hundred twenty-one".