471785121 has 16 divisors (see below), whose sum is σ = 715197120. Its totient is φ = 307208160.

The previous prime is 471785117. The next prime is 471785159. The reversal of 471785121 is 121587174.

471785121 is a `hidden beast` number, since 4 + 71 + 78 + 512 + 1 = 666.

It is not a de Polignac number, because 471785121 - 2² = 471785117 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (471785101) 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, 202020 + ... + 204341.

It is an arithmetic number, because the mean of its divisors is an integer number (44699820).

Almost surely, 2^471785121 is an apocalyptic number.

It is an amenable number.

471785121 is a deficient number, since it is larger than the sum of its proper divisors (243411999).

471785121 is a wasteful number, since it uses less digits than its factorization.

471785121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 406413 (or 406407 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

The square root of 471785121 is about 21720.6151155993. The cubic root of 471785121 is about 778.4811122492.

It can be divided in two parts, 471785 and 121, that added together give a triangular number (471906 = T₉₇₁).

The spelling of 471785121 in words is "four hundred seventy-one million, seven hundred eighty-five thousand, one hundred twenty-one".