172951 has 4 divisors (see below), whose sum is σ = 174832. Its totient is φ = 171072.

The previous prime is 172933. The next prime is 172969. The reversal of 172951 is 159271.

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

It is an interprime number because it is at equal distance from previous prime (172933) and next prime (172969).

It is a cyclic number.

It is not a de Polignac number, because 172951 - 2⁹ = 172439 is a prime.

It is a Duffinian number.

172951 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172981) 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, 795 + ... + 988.

It is an arithmetic number, because the mean of its divisors is an integer number (43708).

2¹⁷²⁹⁵¹ is an apocalyptic number.

172951 is a deficient number, since it is larger than the sum of its proper divisors (1881).

172951 is an equidigital number, since it uses as much as digits as its factorization.

172951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880.

The product of its digits is 630, while the sum is 25.

The square root of 172951 is about 415.8737789282. The cubic root of 172951 is about 55.7152853520.

The spelling of 172951 in words is "one hundred seventy-two thousand, nine hundred fifty-one".