420931171 has 16 divisors (see below), whose sum is σ = 439971840. Its totient is φ = 402383520.

The previous prime is 420931163. The next prime is 420931177. The reversal of 420931171 is 171139024.

It is a cyclic number.

It is not a de Polignac number, because 420931171 - 2³ = 420931163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420931177) 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, 1004400 + ... + 1004818.

It is an arithmetic number, because the mean of its divisors is an integer number (27498240).

Almost surely, 2^420931171 is an apocalyptic number.

420931171 is a deficient number, since it is larger than the sum of its proper divisors (19040669).

420931171 is a wasteful number, since it uses less digits than its factorization.

420931171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 420931171 is about 20516.6072000221. The cubic root of 420931171 is about 749.4402763090.

It can be divided in two parts, 42093 and 1171, that added together give a square (43264 = 208²).

The spelling of 420931171 in words is "four hundred twenty million, nine hundred thirty-one thousand, one hundred seventy-one".