4253520421 has 2 divisors, whose sum is σ = 4253520422. Its totient is φ = 4253520420.

The previous prime is 4253520413. The next prime is 4253520437. The reversal of 4253520421 is 1240253524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2225008900 + 2028511521 = 47170^2 + 45039^2 .

It is a cyclic number.

It is not a de Polignac number, because 4253520421 - 2³ = 4253520413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4253520421.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4253520461) 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, 2126760210 + 2126760211.

It is an arithmetic number, because the mean of its divisors is an integer number (2126760211).

Almost surely, 2^4253520421 is an apocalyptic number.

It is an amenable number.

4253520421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4253520421 is an equidigital number, since it uses as much as digits as its factorization.

4253520421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 4253520421 is about 65219.0188595321. The cubic root of 4253520421 is about 1620.2530241631.

Adding to 4253520421 its reverse (1240253524), we get a palindrome (5493773945).

The spelling of 4253520421 in words is "four billion, two hundred fifty-three million, five hundred twenty thousand, four hundred twenty-one".