126821459 has 4 divisors (see below), whose sum is σ = 130249104. Its totient is φ = 123393816.

The previous prime is 126821399. The next prime is 126821467. The reversal of 126821459 is 954128621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954128621 = 17 ⋅56125213.

It is not a de Polignac number, because 126821459 - 2⁸ = 126821203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126821059) 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, 1713767 + ... + 1713840.

It is an arithmetic number, because the mean of its divisors is an integer number (32562276).

Almost surely, 2^126821459 is an apocalyptic number.

126821459 is a deficient number, since it is larger than the sum of its proper divisors (3427645).

126821459 is an equidigital number, since it uses as much as digits as its factorization.

126821459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3427644.

The product of its digits is 34560, while the sum is 38.

The square root of 126821459 is about 11261.5034076272. The cubic root of 126821459 is about 502.4169102652.

It can be divided in two parts, 12682 and 1459, that added together give a palindrome (14141).

The spelling of 126821459 in words is "one hundred twenty-six million, eight hundred twenty-one thousand, four hundred fifty-nine".