172742513 has 4 divisors (see below), whose sum is σ = 172770288. Its totient is φ = 172714740.

The previous prime is 172742483. The next prime is 172742519. The reversal of 172742513 is 315247271.

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: 315247271 = 607 ⋅519353.

It is a cyclic number.

It is not a de Polignac number, because 172742513 - 2¹⁰ = 172741489 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 172742513.

It is not an unprimeable number, because it can be changed into a prime (172742519) 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, 218 + ... + 18588.

It is an arithmetic number, because the mean of its divisors is an integer number (43192572).

Almost surely, 2^172742513 is an apocalyptic number.

It is an amenable number.

172742513 is a deficient number, since it is larger than the sum of its proper divisors (27775).

172742513 is an equidigital number, since it uses as much as digits as its factorization.

172742513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27774.

The product of its digits is 11760, while the sum is 32.

The square root of 172742513 is about 13143.1546061058. The cubic root of 172742513 is about 556.9288867436.

Adding to 172742513 its reverse (315247271), we get a palindrome (487989784).

The spelling of 172742513 in words is "one hundred seventy-two million, seven hundred forty-two thousand, five hundred thirteen".