420071173 has 16 divisors (see below), whose sum is σ = 466020864. Its totient is φ = 376865280.

The previous prime is 420071167. The next prime is 420071191. The reversal of 420071173 is 371170024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 420071173 - 2²¹ = 417974021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420071143) 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, 29361 + ... + 41257.

It is an arithmetic number, because the mean of its divisors is an integer number (29126304).

Almost surely, 2^420071173 is an apocalyptic number.

It is an amenable number.

420071173 is a deficient number, since it is larger than the sum of its proper divisors (45949691).

420071173 is a wasteful number, since it uses less digits than its factorization.

420071173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12012.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 420071173 is about 20495.6379017585. The cubic root of 420071173 is about 748.9295383575.

The spelling of 420071173 in words is "four hundred twenty million, seventy-one thousand, one hundred seventy-three".