442001403 has 6 divisors (see below), whose sum is σ = 638446484. Its totient is φ = 294667596.

The previous prime is 442001381. The next prime is 442001407. The reversal of 442001403 is 304100244.

It is not a de Polignac number, because 442001403 - 2⁹ = 442000891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442001407) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 24555625 + ... + 24555642.

Almost surely, 2^442001403 is an apocalyptic number.

442001403 is a deficient number, since it is larger than the sum of its proper divisors (196445081).

442001403 is a wasteful number, since it uses less digits than its factorization.

442001403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49111273 (or 49111270 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 442001403 is about 21023.8294085545. The cubic root of 442001403 is about 761.7419662835.

Adding to 442001403 its reverse (304100244), we get a palindrome (746101647).

The spelling of 442001403 in words is "four hundred forty-two million, one thousand, four hundred three".