442351345 has 4 divisors (see below), whose sum is σ = 530821620. Its totient is φ = 353881072.

The previous prime is 442351291. The next prime is 442351361. The reversal of 442351345 is 543153244.

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 235192896 + 207158449 = 15336^2 + 14393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442351345 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44235130 + ... + 44235139.

It is an arithmetic number, because the mean of its divisors is an integer number (132705405).

Almost surely, 2^442351345 is an apocalyptic number.

It is an amenable number.

442351345 is a deficient number, since it is larger than the sum of its proper divisors (88470275).

442351345 is an equidigital number, since it uses as much as digits as its factorization.

442351345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88470274.

The product of its digits is 28800, while the sum is 31.

The square root of 442351345 is about 21032.1502704788. The cubic root of 442351345 is about 761.9429424099.

The spelling of 442351345 in words is "four hundred forty-two million, three hundred fifty-one thousand, three hundred forty-five".