126197 has 4 divisors (see below), whose sum is σ = 127596. Its totient is φ = 124800.

The previous prime is 126173. The next prime is 126199. The reversal of 126197 is 791621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791621 = 47 ⋅16843.

It can be written as a sum of positive squares in 2 ways, for example, as 17956 + 108241 = 134^2 + 329^2 .

It is a cyclic number.

It is not a de Polignac number, because 126197 - 2⁸ = 125941 is a prime.

It is a fibodiv number, since the Fibonacci-like sequence with seeds 1261 and 97 contains 126197 itself.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126199) 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, 554 + ... + 747.

It is an arithmetic number, because the mean of its divisors is an integer number (31899).

2¹²⁶¹⁹⁷ is an apocalyptic number.

It is an amenable number.

126197 is a deficient number, since it is larger than the sum of its proper divisors (1399).

126197 is an equidigital number, since it uses as much as digits as its factorization.

126197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398.

The product of its digits is 756, while the sum is 26.

The square root of 126197 is about 355.2421709201. The cubic root of 126197 is about 50.1590932499.

It can be divided in two parts, 126 and 197, that added together give a palindrome (323).

The spelling of 126197 in words is "one hundred twenty-six thousand, one hundred ninety-seven".