504051421 has 2 divisors, whose sum is σ = 504051422. Its totient is φ = 504051420.

The previous prime is 504051419. The next prime is 504051467. The reversal of 504051421 is 124150405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 501536025 + 2515396 = 22395^2 + 1586^2 .

It is a cyclic number.

It is not a de Polignac number, because 504051421 - 2¹ = 504051419 is a prime.

Together with 504051419, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 504051392 and 504051401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (504055421) 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 as a sum of consecutive naturals, namely, 252025710 + 252025711.

It is an arithmetic number, because the mean of its divisors is an integer number (252025711).

Almost surely, 2^504051421 is an apocalyptic number.

It is an amenable number.

504051421 is a deficient number, since it is larger than the sum of its proper divisors (1).

504051421 is an equidigital number, since it uses as much as digits as its factorization.

504051421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 504051421 is about 22451.0895281276. The cubic root of 504051421 is about 795.8385050902.

The spelling of 504051421 in words is "five hundred four million, fifty-one thousand, four hundred twenty-one".