524212421 has 2 divisors, whose sum is σ = 524212422. Its totient is φ = 524212420.

The previous prime is 524212417. The next prime is 524212427. The reversal of 524212421 is 124212425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 452200225 + 72012196 = 21265^2 + 8486^2 .

It is a cyclic number.

It is not a de Polignac number, because 524212421 - 2² = 524212417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (524212427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262106210 + 262106211.

It is an arithmetic number, because the mean of its divisors is an integer number (262106211).

Almost surely, 2^524212421 is an apocalyptic number.

It is an amenable number.

524212421 is a deficient number, since it is larger than the sum of its proper divisors (1).

524212421 is an equidigital number, since it uses as much as digits as its factorization.

524212421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 23.

The square root of 524212421 is about 22895.6856416225. The cubic root of 524212421 is about 806.3107234997.

Adding to 524212421 its reverse (124212425), we get a palindrome (648424846).

The spelling of 524212421 in words is "five hundred twenty-four million, two hundred twelve thousand, four hundred twenty-one".