421185166 has 16 divisors (see below), whose sum is σ = 669321360. Its totient is φ = 198092160.

The previous prime is 421185161. The next prime is 421185173. The reversal of 421185166 is 661581124.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421185161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116161 + ... + 119731.

It is an arithmetic number, because the mean of its divisors is an integer number (41832585).

Almost surely, 2^421185166 is an apocalyptic number.

421185166 is a deficient number, since it is larger than the sum of its proper divisors (248136194).

421185166 is a wasteful number, since it uses less digits than its factorization.

421185166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7059.

The product of its digits is 11520, while the sum is 34.

The square root of 421185166 is about 20522.7962519731. The cubic root of 421185166 is about 749.5909864659.

The spelling of 421185166 in words is "four hundred twenty-one million, one hundred eighty-five thousand, one hundred sixty-six".