442321605 has 48 divisors (see below), whose sum is σ = 848937024. Its totient is φ = 211242240.

The previous prime is 442321603. The next prime is 442321613. The reversal of 442321605 is 506123244.

442321605 is a `hidden beast` number, since 442 + 3 + 216 + 0 + 5 = 666.

It is not a de Polignac number, because 442321605 - 2¹ = 442321603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442321603) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26497 + ... + 39833.

It is an arithmetic number, because the mean of its divisors is an integer number (17686188).

Almost surely, 2^442321605 is an apocalyptic number.

442321605 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

442321605 is a deficient number, since it is larger than the sum of its proper divisors (406615419).

442321605 is a wasteful number, since it uses less digits than its factorization.

442321605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13426 (or 13423 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 442321605 is about 21031.4432457689. The cubic root of 442321605 is about 761.9258664730.

Adding to 442321605 its reverse (506123244), we get a palindrome (948444849).

The spelling of 442321605 in words is "four hundred forty-two million, three hundred twenty-one thousand, six hundred five".