172626945 has 16 divisors (see below), whose sum is σ = 276981120. Its totient is φ = 91808384.

The previous prime is 172626901. The next prime is 172626947. The reversal of 172626945 is 549626271.

It is a cyclic number.

It is not a de Polignac number, because 172626945 - 2¹³ = 172618753 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 172626897 and 172626906.

It is not an unprimeable number, because it can be changed into a prime (172626947) 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, 10644 + ... + 21413.

It is an arithmetic number, because the mean of its divisors is an integer number (17311320).

Almost surely, 2^172626945 is an apocalyptic number.

172626945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

172626945 is a deficient number, since it is larger than the sum of its proper divisors (104354175).

172626945 is a wasteful number, since it uses less digits than its factorization.

172626945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32424.

The product of its digits is 181440, while the sum is 42.

The square root of 172626945 is about 13138.7573613337. The cubic root of 172626945 is about 556.8046603923.

The spelling of 172626945 in words is "one hundred seventy-two million, six hundred twenty-six thousand, nine hundred forty-five".