4198842521 has 2 divisors, whose sum is σ = 4198842522. Its totient is φ = 4198842520.

The previous prime is 4198842469. The next prime is 4198842539. The reversal of 4198842521 is 1252488914.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3735043225 + 463799296 = 61115^2 + 21536^2 .

It is a cyclic number.

It is not a de Polignac number, because 4198842521 - 2¹⁰ = 4198841497 is a prime.

It is not a weakly prime, because it can be changed into another prime (4198842551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2099421260 + 2099421261.

It is an arithmetic number, because the mean of its divisors is an integer number (2099421261).

Almost surely, 2^4198842521 is an apocalyptic number.

It is an amenable number.

4198842521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4198842521 is an equidigital number, since it uses as much as digits as its factorization.

4198842521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 44.

The square root of 4198842521 is about 64798.4762243681. The cubic root of 4198842521 is about 1613.2804173453.

The spelling of 4198842521 in words is "four billion, one hundred ninety-eight million, eight hundred forty-two thousand, five hundred twenty-one".