442035021 has 16 divisors (see below), whose sum is σ = 603777600. Its totient is φ = 287564928.

The previous prime is 442035017. The next prime is 442035029. The reversal of 442035021 is 120530244.

It is not a de Polignac number, because 442035021 - 2² = 442035017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442035029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15135 + ... + 33363.

It is an arithmetic number, because the mean of its divisors is an integer number (37736100).

Almost surely, 2^442035021 is an apocalyptic number.

It is an amenable number.

442035021 is a deficient number, since it is larger than the sum of its proper divisors (161742579).

442035021 is a wasteful number, since it uses less digits than its factorization.

442035021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18428.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 442035021 is about 21024.6289146800. The cubic root of 442035021 is about 761.7612781318.

Adding to 442035021 its reverse (120530244), we get a palindrome (562565265).

It can be divided in two parts, 44203502 and 1, that added together give a triangular number (44203503 = T₉₄₀₂).

The spelling of 442035021 in words is "four hundred forty-two million, thirty-five thousand, twenty-one".