4172985 has 16 divisors (see below), whose sum is σ = 7418880. Its totient is φ = 2225520.

The previous prime is 4172981. The next prime is 4173023. The reversal of 4172985 is 5892714.

It is not a de Polignac number, because 4172985 - 2² = 4172981 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4172981) 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, 15321 + ... + 15590.

It is an arithmetic number, because the mean of its divisors is an integer number (463680).

Almost surely, 2^4172985 is an apocalyptic number.

4172985 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4172985 is a deficient number, since it is larger than the sum of its proper divisors (3245895).

4172985 is a wasteful number, since it uses less digits than its factorization.

4172985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30925 (or 30919 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 4172985 is about 2042.7885353115. The cubic root of 4172985 is about 160.9961934725.

It can be divided in two parts, 41729 and 85, that added together give a palindrome (41814).

The spelling of 4172985 in words is "four million, one hundred seventy-two thousand, nine hundred eighty-five".