126899 has 4 divisors (see below), whose sum is σ = 128136. Its totient is φ = 125664.

The previous prime is 126859. The next prime is 126913. The reversal of 126899 is 998621.

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

It is a cyclic number.

It is not a de Polignac number, because 126899 - 2¹⁶ = 61363 is a prime.

It is a super-2 number, since 2×126899² = 32206712402, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 2⁹ + 8³ + 6⁵ + 9⁵ + 9⁵ .

It is a Duffinian number.

It is a plaindrome in base 10 and base 15.

It is not an unprimeable number, because it can be changed into a prime (126839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449 + ... + 674.

It is an arithmetic number, because the mean of its divisors is an integer number (32034).

2¹²⁶⁸⁹⁹ is an apocalyptic number.

126899 is a deficient number, since it is larger than the sum of its proper divisors (1237).

126899 is a wasteful number, since it uses less digits than its factorization.

126899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236.

The product of its digits is 7776, while the sum is 35.

The square root of 126899 is about 356.2288590218. The cubic root of 126899 is about 50.2519285086.

The spelling of 126899 in words is "one hundred twenty-six thousand, eight hundred ninety-nine".