172118612 has 12 divisors (see below), whose sum is σ = 302017716. Its totient is φ = 85827840.

The previous prime is 172118599. The next prime is 172118623. The reversal of 172118612 is 216811271.

It can be written as a sum of positive squares in 2 ways, for example, as 127148176 + 44970436 = 11276^2 + 6706^2 .

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, 56189 + ... + 59172.

It is an arithmetic number, because the mean of its divisors is an integer number (25168143).

Almost surely, 2^172118612 is an apocalyptic number.

It is an amenable number.

172118612 is a deficient number, since it is larger than the sum of its proper divisors (129899104).

172118612 is a wasteful number, since it uses less digits than its factorization.

172118612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115738 (or 115736 counting only the distinct ones).

The product of its digits is 1344, while the sum is 29.

The square root of 172118612 is about 13119.3983093738. The cubic root of 172118612 is about 556.2575838380.

Adding to 172118612 its reverse (216811271), we get a palindrome (388929883).

The spelling of 172118612 in words is "one hundred seventy-two million, one hundred eighteen thousand, six hundred twelve".