420022161 has 12 divisors (see below), whose sum is σ = 653367988. Its totient is φ = 258475104.

The previous prime is 420022157. The next prime is 420022177. The reversal of 420022161 is 161220024.

It can be written as a sum of positive squares in 2 ways, for example, as 180391761 + 239630400 = 13431^2 + 15480^2 .

It is not a de Polignac number, because 420022161 - 2² = 420022157 is a prime.

It is a super-2 number, since 2×420022161² = 352837231462219842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (420022181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1794850 + ... + 1795083.

Almost surely, 2^420022161 is an apocalyptic number.

It is an amenable number.

420022161 is a deficient number, since it is larger than the sum of its proper divisors (233345827).

420022161 is a wasteful number, since it uses less digits than its factorization.

420022161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3589952 (or 3589949 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 420022161 is about 20494.4421978252. The cubic root of 420022161 is about 748.9004099903.

Adding to 420022161 its reverse (161220024), we get a palindrome (581242185).

The spelling of 420022161 in words is "four hundred twenty million, twenty-two thousand, one hundred sixty-one".