126869 has 4 divisors (see below), whose sum is σ = 127596. Its totient is φ = 126144.

The previous prime is 126859. The next prime is 126913. The reversal of 126869 is 968621.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 968621 = 433 ⋅2237.

It can be written as a sum of positive squares in 2 ways, for example, as 70225 + 56644 = 265^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 126869 - 2⁸ = 126613 is a prime.

It is a super-2 number, since 2×126869² = 32191486322, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126839) 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, 77 + ... + 509.

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

2¹²⁶⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

126869 is a deficient number, since it is larger than the sum of its proper divisors (727).

126869 is an equidigital number, since it uses as much as digits as its factorization.

126869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its digits is 5184, while the sum is 32.

The square root of 126869 is about 356.1867487709. The cubic root of 126869 is about 50.2479682025.

It can be divided in two parts, 12 and 6869, that multiplied together give a palindrome (82428).

The spelling of 126869 in words is "one hundred twenty-six thousand, eight hundred sixty-nine".