420016161 has 32 divisors (see below), whose sum is σ = 602380800. Its totient is φ = 259395840.

The previous prime is 420016139. The next prime is 420016169. The reversal of 420016161 is 161610024.

It is not a de Polignac number, because 420016161 - 2⁶ = 420016097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420016169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1268766 + ... + 1269096.

It is an arithmetic number, because the mean of its divisors is an integer number (18824400).

Almost surely, 2^420016161 is an apocalyptic number.

It is an amenable number.

420016161 is a deficient number, since it is larger than the sum of its proper divisors (182364639).

420016161 is a wasteful number, since it uses less digits than its factorization.

420016161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 420016161 is about 20494.2958161533. The cubic root of 420016161 is about 748.8968439690.

Adding to 420016161 its reverse (161610024), we get a palindrome (581626185).

The spelling of 420016161 in words is "four hundred twenty million, sixteen thousand, one hundred sixty-one".