42245458369 has 3 divisors (see below), whose sum is σ = 42245663907. Its totient is φ = 42245252832.

The previous prime is 42245458331. The next prime is 42245458391. The reversal of 42245458369 is 96385454224.

The square root of 42245458369 is 205537.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 7987890625 + 34257567744 = 89375^2 + 185088^2 .

It is not a de Polignac number, because 42245458369 - 2⁹ = 42245457857 is a prime.

It is a super-2 number, since 2×42245458369² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42245458309) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 102769 + ... + 308305.

It is an arithmetic number, because the mean of its divisors is an integer number (14081887969).

Almost surely, 2^42245458369 is an apocalyptic number.

42245458369 is the 205537-th square number.

42245458369 is the 102769-th centered octagonal number.

It is an amenable number.

42245458369 is a deficient number, since it is larger than the sum of its proper divisors (205538).

42245458369 is an frugal number, since it uses more digits than its factorization.

42245458369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 411074 (or 205537 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 52.

The spelling of 42245458369 in words is "forty-two billion, two hundred forty-five million, four hundred fifty-eight thousand, three hundred sixty-nine".