442340243 has 4 divisors (see below), whose sum is σ = 443362248. Its totient is φ = 441318240.

The previous prime is 442340237. The next prime is 442340281. The reversal of 442340243 is 342043244.

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 442340243 - 2²⁰ = 441291667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442340443) 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, 510353 + ... + 511218.

It is an arithmetic number, because the mean of its divisors is an integer number (110840562).

Almost surely, 2^442340243 is an apocalyptic number.

442340243 is a deficient number, since it is larger than the sum of its proper divisors (1022005).

442340243 is a wasteful number, since it uses less digits than its factorization.

442340243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022004.

The product of its (nonzero) digits is 9216, while the sum is 26.

The square root of 442340243 is about 21031.8863395559. The cubic root of 442340243 is about 761.9365680189.

Adding to 442340243 its reverse (342043244), we get a palindrome (784383487).

The spelling of 442340243 in words is "four hundred forty-two million, three hundred forty thousand, two hundred forty-three".