126668459 has 4 divisors (see below), whose sum is σ = 133335240. Its totient is φ = 120001680.

The previous prime is 126668453. The next prime is 126668461. The reversal of 126668459 is 954866621.

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 126668459 - 2⁸ = 126668203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126668453) 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, 3333362 + ... + 3333399.

It is an arithmetic number, because the mean of its divisors is an integer number (33333810).

Almost surely, 2^126668459 is an apocalyptic number.

126668459 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

126668459 is a deficient number, since it is larger than the sum of its proper divisors (6666781).

126668459 is an equidigital number, since it uses as much as digits as its factorization.

126668459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6666780.

The product of its digits is 622080, while the sum is 47.

The square root of 126668459 is about 11254.7083036390. The cubic root of 126668459 is about 502.2147869520.

The spelling of 126668459 in words is "one hundred twenty-six million, six hundred sixty-eight thousand, four hundred fifty-nine".