172087 has 4 divisors (see below), whose sum is σ = 176776. Its totient is φ = 167400.

The previous prime is 172079. The next prime is 172093. The reversal of 172087 is 780271.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780271 = 41 ⋅19031.

It is a cyclic number.

It is not a de Polignac number, because 172087 - 2³ = 172079 is a prime.

It is a super-2 number, since 2×172087² = 59227871138, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172027) 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, 2289 + ... + 2362.

It is an arithmetic number, because the mean of its divisors is an integer number (44194).

2¹⁷²⁰⁸⁷ is an apocalyptic number.

172087 is a deficient number, since it is larger than the sum of its proper divisors (4689).

172087 is an equidigital number, since it uses as much as digits as its factorization.

172087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4688.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 172087 is about 414.8337016203. The cubic root of 172087 is about 55.6223526914.

The spelling of 172087 in words is "one hundred seventy-two thousand, eighty-seven".