422521605 has 96 divisors (see below), whose sum is σ = 830269440. Its totient is φ = 196992000.

The previous prime is 422521531. The next prime is 422521609. The reversal of 422521605 is 506125224.

422521605 is a `hidden beast` number, since 4 + 2 + 2 + 52 + 1 + 605 = 666.

It is not a de Polignac number, because 422521605 - 2¹⁴ = 422505221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422521609) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2212060 + ... + 2212250.

It is an arithmetic number, because the mean of its divisors is an integer number (8648640).

Almost surely, 2^422521605 is an apocalyptic number.

422521605 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

422521605 is a deficient number, since it is larger than the sum of its proper divisors (407747835).

422521605 is a wasteful number, since it uses less digits than its factorization.

422521605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363 (or 360 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 422521605 is about 20555.3303305979. The cubic root of 422521605 is about 750.3829777374.

Adding to 422521605 its reverse (506125224), we get a palindrome (928646829).

The spelling of 422521605 in words is "four hundred twenty-two million, five hundred twenty-one thousand, six hundred five".