172086745 has 4 divisors (see below), whose sum is σ = 206504100. Its totient is φ = 137669392.

The previous prime is 172086721. The next prime is 172086749. The reversal of 172086745 is 547680271.

172086745 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 547680271 = 16141 ⋅33931.

It can be written as a sum of positive squares in 2 ways, for example, as 33977241 + 138109504 = 5829^2 + 11752^2 .

It is a cyclic number.

It is not a de Polignac number, because 172086745 - 2⁷ = 172086617 is a prime.

It is a super-2 number, since 2×172086745² = 59227695609390050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 172086698 and 172086707.

It is not an unprimeable number, because it can be changed into a prime (172086749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17208670 + ... + 17208679.

It is an arithmetic number, because the mean of its divisors is an integer number (51626025).

Almost surely, 2^172086745 is an apocalyptic number.

It is an amenable number.

172086745 is a deficient number, since it is larger than the sum of its proper divisors (34417355).

172086745 is an equidigital number, since it uses as much as digits as its factorization.

172086745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34417354.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 172086745 is about 13118.1837538586. The cubic root of 172086745 is about 556.2232521751.

The spelling of 172086745 in words is "one hundred seventy-two million, eighty-six thousand, seven hundred forty-five".