442632143 has 4 divisors (see below), whose sum is σ = 446769000. Its totient is φ = 438495288.

The previous prime is 442632139. The next prime is 442632161. The reversal of 442632143 is 341236244.

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

It is a cyclic number.

It is not a de Polignac number, because 442632143 - 2² = 442632139 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442632173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2068268 + ... + 2068481.

It is an arithmetic number, because the mean of its divisors is an integer number (111692250).

Almost surely, 2^442632143 is an apocalyptic number.

442632143 is a deficient number, since it is larger than the sum of its proper divisors (4136857).

442632143 is a wasteful number, since it uses less digits than its factorization.

442632143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4136856.

The product of its digits is 13824, while the sum is 29.

The square root of 442632143 is about 21038.8246582360. The cubic root of 442632143 is about 762.1041316256.

Adding to 442632143 its reverse (341236244), we get a palindrome (783868387).

The spelling of 442632143 in words is "four hundred forty-two million, six hundred thirty-two thousand, one hundred forty-three".