126769 has 4 divisors (see below), whose sum is σ = 134244. Its totient is φ = 119296.

The previous prime is 126761. The next prime is 126781. The reversal of 126769 is 967621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 967621 = 53 ⋅18257.

It can be written as a sum of positive squares in 2 ways, for example, as 69169 + 57600 = 263^2 + 240^2 .

It is a cyclic number.

It is not a de Polignac number, because 126769 - 2³ = 126761 is a prime.

It is a super-2 number, since 2×126769² = 32140758722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 126769.

It is not an unprimeable number, because it can be changed into a prime (126761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3712 + ... + 3745.

It is an arithmetic number, because the mean of its divisors is an integer number (33561).

2¹²⁶⁷⁶⁹ is an apocalyptic number.

It is an amenable number.

126769 is a deficient number, since it is larger than the sum of its proper divisors (7475).

126769 is an equidigital number, since it uses as much as digits as its factorization.

126769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7474.

The product of its digits is 4536, while the sum is 31.

The square root of 126769 is about 356.0463452979. The cubic root of 126769 is about 50.2347626713.

The spelling of 126769 in words is "one hundred twenty-six thousand, seven hundred sixty-nine".