422801721 has 16 divisors (see below), whose sum is σ = 630884800. Its totient is φ = 279837504.

The previous prime is 422801711. The next prime is 422801783. The reversal of 422801721 is 127108224.

It is not a de Polignac number, because 422801721 - 2⁵ = 422801689 is a prime.

It is a super-2 number, since 2×422801721² = 357522590561123682, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (422801711) 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, 52576 + ... + 60081.

It is an arithmetic number, because the mean of its divisors is an integer number (39430300).

Almost surely, 2^422801721 is an apocalyptic number.

It is an amenable number.

422801721 is a deficient number, since it is larger than the sum of its proper divisors (208083079).

422801721 is a wasteful number, since it uses less digits than its factorization.

422801721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112805 (or 112799 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 422801721 is about 20562.1429087535. The cubic root of 422801721 is about 750.5487663760.

Adding to 422801721 its reverse (127108224), we get a palindrome (549909945).

The spelling of 422801721 in words is "four hundred twenty-two million, eight hundred one thousand, seven hundred twenty-one".