5851421 has 2 divisors, whose sum is σ = 5851422. Its totient is φ = 5851420.

The previous prime is 5851409. The next prime is 5851423. The reversal of 5851421 is 1241585.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5827396 + 24025 = 2414^2 + 155^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5851421 is a prime.

It is a Sophie Germain prime.

Together with 5851423, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5851423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2925710 + 2925711.

It is an arithmetic number, because the mean of its divisors is an integer number (2925711).

Almost surely, 2^5851421 is an apocalyptic number.

It is an amenable number.

5851421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5851421 is an equidigital number, since it uses as much as digits as its factorization.

5851421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1600, while the sum is 26.

The square root of 5851421 is about 2418.9710622494. The cubic root of 5851421 is about 180.1995831481.

The spelling of 5851421 in words is "five million, eight hundred fifty-one thousand, four hundred twenty-one".