172005112 has 16 divisors (see below), whose sum is σ = 332913600. Its totient is φ = 83228160.

The previous prime is 172005103. The next prime is 172005131. The reversal of 172005112 is 211500271.

It is a self number, because there is not a number n which added to its sum of digits gives 172005112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346537 + ... + 347032.

It is an arithmetic number, because the mean of its divisors is an integer number (20807100).

Almost surely, 2^172005112 is an apocalyptic number.

It is an amenable number.

172005112 is a deficient number, since it is larger than the sum of its proper divisors (160908488).

172005112 is a wasteful number, since it uses less digits than its factorization.

172005112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693606 (or 693602 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 172005112 is about 13115.0719403288. The cubic root of 172005112 is about 556.1352861623.

Adding to 172005112 its reverse (211500271), we get a palindrome (383505383).

The spelling of 172005112 in words is "one hundred seventy-two million, five thousand, one hundred twelve".