172115126 has 8 divisors (see below), whose sum is σ = 258299064. Its totient is φ = 86015440.

The previous prime is 172115117. The next prime is 172115137. The reversal of 172115126 is 621511271.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 172115095 and 172115104.

It is a congruent number.

It is an unprimeable number.

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, 15680 + ... + 24291.

It is an arithmetic number, because the mean of its divisors is an integer number (32287383).

Almost surely, 2^172115126 is an apocalyptic number.

172115126 is a deficient number, since it is larger than the sum of its proper divisors (86183938).

172115126 is a wasteful number, since it uses less digits than its factorization.

172115126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42126.

The product of its digits is 840, while the sum is 26.

The square root of 172115126 is about 13119.2654519984. The cubic root of 172115126 is about 556.2538284297.

Adding to 172115126 its reverse (621511271), we get a palindrome (793626397).

The spelling of 172115126 in words is "one hundred seventy-two million, one hundred fifteen thousand, one hundred twenty-six".