420069181 has 8 divisors (see below), whose sum is σ = 480205440. Its totient is φ = 359964528.

The previous prime is 420069179. The next prime is 420069187. The reversal of 420069181 is 181960024.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420069181 - 2¹ = 420069179 is a prime.

It is a super-2 number, since 2×420069181² = 352916233652021522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420069187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39795 + ... + 49231.

It is an arithmetic number, because the mean of its divisors is an integer number (60025680).

Almost surely, 2^420069181 is an apocalyptic number.

It is an amenable number.

420069181 is a deficient number, since it is larger than the sum of its proper divisors (60136259).

420069181 is an equidigital number, since it uses as much as digits as its factorization.

420069181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15803.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 420069181 is about 20495.5893059946. The cubic root of 420069181 is about 748.9283545343.

The spelling of 420069181 in words is "four hundred twenty million, sixty-nine thousand, one hundred eighty-one".