504280421 has 2 divisors, whose sum is σ = 504280422. Its totient is φ = 504280420.

The previous prime is 504280369. The next prime is 504280433. The reversal of 504280421 is 124082405.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 493950625 + 10329796 = 22225^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 504280421 - 2¹⁴ = 504264037 is a prime.

It is a Sophie Germain 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 (504280321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252140210 + 252140211.

It is an arithmetic number, because the mean of its divisors is an integer number (252140211).

Almost surely, 2^504280421 is an apocalyptic number.

It is an amenable number.

504280421 is a deficient number, since it is larger than the sum of its proper divisors (1).

504280421 is an equidigital number, since it uses as much as digits as its factorization.

504280421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 504280421 is about 22456.1889242142. The cubic root of 504280421 is about 795.9590082886.

The spelling of 504280421 in words is "five hundred four million, two hundred eighty thousand, four hundred twenty-one".