524404421 has 2 divisors, whose sum is σ = 524404422. Its totient is φ = 524404420.

The previous prime is 524404409. The next prime is 524404429. The reversal of 524404421 is 124404425.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 376903396 + 147501025 = 19414^2 + 12145^2 .

It is a cyclic number.

It is not a de Polignac number, because 524404421 - 2¹⁸ = 524142277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (524404429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262202210 + 262202211.

It is an arithmetic number, because the mean of its divisors is an integer number (262202211).

Almost surely, 2^524404421 is an apocalyptic number.

It is an amenable number.

524404421 is a deficient number, since it is larger than the sum of its proper divisors (1).

524404421 is an equidigital number, since it uses as much as digits as its factorization.

524404421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 26.

The square root of 524404421 is about 22899.8781874489. The cubic root of 524404421 is about 806.4091522765.

Adding to 524404421 its reverse (124404425), we get a palindrome (648808846).

The spelling of 524404421 in words is "five hundred twenty-four million, four hundred four thousand, four hundred twenty-one".