172513 has 4 divisors (see below), whose sum is σ = 188208. Its totient is φ = 156820.

The previous prime is 172507. The next prime is 172517. The reversal of 172513 is 315271.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 315271 = 11 ⋅28661.

It is a cyclic number.

It is not a de Polignac number, because 172513 - 2⁹ = 172001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172517) 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, 7831 + ... + 7852.

It is an arithmetic number, because the mean of its divisors is an integer number (47052).

2¹⁷²⁵¹³ is an apocalyptic number.

It is an amenable number.

172513 is a deficient number, since it is larger than the sum of its proper divisors (15695).

172513 is a wasteful number, since it uses less digits than its factorization.

172513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15694.

The product of its digits is 210, while the sum is 19.

The square root of 172513 is about 415.3468430120. The cubic root of 172513 is about 55.6682124343.

Adding to 172513 its reverse (315271), we get a palindrome (487784).

The spelling of 172513 in words is "one hundred seventy-two thousand, five hundred thirteen".