126421459 has 4 divisors (see below), whose sum is σ = 133075240. Its totient is φ = 119767680.

The previous prime is 126421439. The next prime is 126421487. The reversal of 126421459 is 954124621.

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 126421459 - 2⁷ = 126421331 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126421439) 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, 3326862 + ... + 3326899.

It is an arithmetic number, because the mean of its divisors is an integer number (33268810).

Almost surely, 2^126421459 is an apocalyptic number.

126421459 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

126421459 is a deficient number, since it is larger than the sum of its proper divisors (6653781).

126421459 is an equidigital number, since it uses as much as digits as its factorization.

126421459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6653780.

The product of its digits is 17280, while the sum is 34.

The square root of 126421459 is about 11243.7297637394. The cubic root of 126421459 is about 501.8881395496. Note that the first 3 decimals are identical.

The spelling of 126421459 in words is "one hundred twenty-six million, four hundred twenty-one thousand, four hundred fifty-nine".