4342398521 has 4 divisors (see below), whose sum is σ = 4413585444. Its totient is φ = 4271211600.

The previous prime is 4342398499. The next prime is 4342398547. The reversal of 4342398521 is 1258932434.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2464129600 + 1878268921 = 49640^2 + 43339^2 .

It is a cyclic number.

It is not a de Polignac number, because 4342398521 - 2¹⁴ = 4342382137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4342398421) 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 in 3 ways as a sum of consecutive naturals, for example, 35593370 + ... + 35593491.

It is an arithmetic number, because the mean of its divisors is an integer number (1103396361).

Almost surely, 2^4342398521 is an apocalyptic number.

It is an amenable number.

4342398521 is a deficient number, since it is larger than the sum of its proper divisors (71186923).

4342398521 is an equidigital number, since it uses as much as digits as its factorization.

4342398521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71186922.

The product of its digits is 207360, while the sum is 41.

The square root of 4342398521 is about 65896.8779305970. The cubic root of 4342398521 is about 1631.4604849555.

The spelling of 4342398521 in words is "four billion, three hundred forty-two million, three hundred ninety-eight thousand, five hundred twenty-one".