126997 has 4 divisors (see below), whose sum is σ = 136780. Its totient is φ = 117216.

The previous prime is 126989. The next prime is 127031. The reversal of 126997 is 799621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30276 + 96721 = 174^2 + 311^2 .

It is a cyclic number.

It is not a de Polignac number, because 126997 - 2³ = 126989 is a prime.

It is a super-2 number, since 2×126997² = 32256476018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126967) 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, 4872 + ... + 4897.

It is an arithmetic number, because the mean of its divisors is an integer number (34195).

2¹²⁶⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

126997 is a deficient number, since it is larger than the sum of its proper divisors (9783).

126997 is an equidigital number, since it uses as much as digits as its factorization.

126997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9782.

The product of its digits is 6804, while the sum is 34.

The square root of 126997 is about 356.3663844978. The cubic root of 126997 is about 50.2648611606.

The spelling of 126997 in words is "one hundred twenty-six thousand, nine hundred ninety-seven".