421601165 has 16 divisors (see below), whose sum is σ = 533070720. Its totient is φ = 319216320.

The previous prime is 421601161. The next prime is 421601177. The reversal of 421601165 is 561106124.

It is not a de Polignac number, because 421601165 - 2² = 421601161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421601161) 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, 154160 + ... + 156870.

It is an arithmetic number, because the mean of its divisors is an integer number (33316920).

Almost surely, 2^421601165 is an apocalyptic number.

It is an amenable number.

421601165 is a deficient number, since it is larger than the sum of its proper divisors (111469555).

421601165 is a wasteful number, since it uses less digits than its factorization.

421601165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4372.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 421601165 is about 20532.9287974220. The cubic root of 421601165 is about 749.8376922849.

Adding to 421601165 its reverse (561106124), we get a palindrome (982707289).

The spelling of 421601165 in words is "four hundred twenty-one million, six hundred one thousand, one hundred sixty-five".