442407542 has 4 divisors (see below), whose sum is σ = 663611316. Its totient is φ = 221203770.

The previous prime is 442407509. The next prime is 442407577. The reversal of 442407542 is 245704244.

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

It is a junction number, because it is equal to n+sod(n) for n = 442407499 and 442407508.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 110601884 + ... + 110601887.

It is an arithmetic number, because the mean of its divisors is an integer number (165902829).

Almost surely, 2^442407542 is an apocalyptic number.

442407542 is a deficient number, since it is larger than the sum of its proper divisors (221203774).

442407542 is a wasteful number, since it uses less digits than its factorization.

442407542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221203773.

The product of its (nonzero) digits is 35840, while the sum is 32.

The square root of 442407542 is about 21033.4862065232. The cubic root of 442407542 is about 761.9752071808.

The spelling of 442407542 in words is "four hundred forty-two million, four hundred seven thousand, five hundred forty-two".