126299 has 4 divisors (see below), whose sum is σ = 128736. Its totient is φ = 123864.

The previous prime is 126271. The next prime is 126307. The reversal of 126299 is 992621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 992621 = 7 ⋅141803.

It is a cyclic number.

It is not a de Polignac number, because 126299 - 2¹² = 122203 is a prime.

It is a d-powerful number, because it can be written as 1 + 2 + 2¹³ + 6 + 9⁵ + 9⁵ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126229) 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, 1139 + ... + 1244.

It is an arithmetic number, because the mean of its divisors is an integer number (32184).

2¹²⁶²⁹⁹ is an apocalyptic number.

126299 is a deficient number, since it is larger than the sum of its proper divisors (2437).

126299 is an equidigital number, since it uses as much as digits as its factorization.

126299 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2436.

The product of its digits is 1944, while the sum is 29.

The square root of 126299 is about 355.3857059590. The cubic root of 126299 is about 50.1726034752.

The spelling of 126299 in words is "one hundred twenty-six thousand, two hundred ninety-nine".