471661 has 4 divisors (see below), whose sum is σ = 492192. Its totient is φ = 451132.

The previous prime is 471659. The next prime is 471671. The reversal of 471661 is 166174.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 471661 - 2¹ = 471659 is a prime.

It is a super-3 number, since 3×471661³ = 314782918083533343, which contains 333 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 (471641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10231 + ... + 10276.

It is an arithmetic number, because the mean of its divisors is an integer number (123048).

2⁴⁷¹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

471661 is a deficient number, since it is larger than the sum of its proper divisors (20531).

471661 is a wasteful number, since it uses less digits than its factorization.

471661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20530.

The product of its digits is 1008, while the sum is 25.

The square root of 471661 is about 686.7758003890. The cubic root of 471661 is about 77.8412836584.

The spelling of 471661 in words is "four hundred seventy-one thousand, six hundred sixty-one".