421254165 has 32 divisors (see below), whose sum is σ = 685990656. Its totient is φ = 220700160.

The previous prime is 421254137. The next prime is 421254167. The reversal of 421254165 is 561452124.

It is not a de Polignac number, because 421254165 - 2⁷ = 421254037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421254167) 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, 339927 + ... + 341163.

It is an arithmetic number, because the mean of its divisors is an integer number (21437208).

Almost surely, 2^421254165 is an apocalyptic number.

It is an amenable number.

421254165 is a deficient number, since it is larger than the sum of its proper divisors (264736491).

421254165 is a wasteful number, since it uses less digits than its factorization.

421254165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1629.

The product of its digits is 9600, while the sum is 30.

The square root of 421254165 is about 20524.4772162411. The cubic root of 421254165 is about 749.6319171607.

The spelling of 421254165 in words is "four hundred twenty-one million, two hundred fifty-four thousand, one hundred sixty-five".