126173 has 2 divisors, whose sum is σ = 126174. Its totient is φ = 126172.

The previous prime is 126151. The next prime is 126199. The reversal of 126173 is 371621.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91204 + 34969 = 302^2 + 187^2 .

It is a cyclic number.

It is not a de Polignac number, because 126173 - 2¹⁰ = 125149 is a prime.

It is an Ulam number.

It is a plaindrome in base 13.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63086 + 63087.

It is an arithmetic number, because the mean of its divisors is an integer number (63087).

2¹²⁶¹⁷³ is an apocalyptic number.

It is an amenable number.

126173 is a deficient number, since it is larger than the sum of its proper divisors (1).

126173 is an equidigital number, since it uses as much as digits as its factorization.

126173 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 20.

The square root of 126173 is about 355.2083895406. The cubic root of 126173 is about 50.1559133154.

Adding to 126173 its reverse (371621), we get a palindrome (497794).

The spelling of 126173 in words is "one hundred twenty-six thousand, one hundred seventy-three".