126289 has 4 divisors (see below), whose sum is σ = 129024. Its totient is φ = 123556.

The previous prime is 126271. The next prime is 126307. The reversal of 126289 is 982621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (126271) and next prime (126307).

It is a cyclic number.

It is not a de Polignac number, because 126289 - 2⁵ = 126257 is a prime.

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, 1297 + ... + 1390.

It is an arithmetic number, because the mean of its divisors is an integer number (32256).

2¹²⁶²⁸⁹ is an apocalyptic number.

It is an amenable number.

126289 is a deficient number, since it is larger than the sum of its proper divisors (2735).

126289 is an equidigital number, since it uses as much as digits as its factorization.

126289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2734.

The product of its digits is 1728, while the sum is 28.

The square root of 126289 is about 355.3716364596. The cubic root of 126289 is about 50.1712792650.

The spelling of 126289 in words is "one hundred twenty-six thousand, two hundred eighty-nine".