172051 has 4 divisors (see below), whose sum is σ = 187704. Its totient is φ = 156400.

The previous prime is 172049. The next prime is 172069. The reversal of 172051 is 150271.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 172051 - 2¹ = 172049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (172001) 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, 7810 + ... + 7831.

It is an arithmetic number, because the mean of its divisors is an integer number (46926).

2¹⁷²⁰⁵¹ is an apocalyptic number.

172051 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

172051 is the 186-th centered decagonal number.

172051 is a deficient number, since it is larger than the sum of its proper divisors (15653).

172051 is a wasteful number, since it uses less digits than its factorization.

172051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15652.

The product of its (nonzero) digits is 70, while the sum is 16.

The square root of 172051 is about 414.7903084692. The cubic root of 172051 is about 55.6184737535.

It can be divided in two parts, 1720 and 51, that added together give a palindrome (1771).

The spelling of 172051 in words is "one hundred seventy-two thousand, fifty-one".