126504979 has 2 divisors, whose sum is σ = 126504980. Its totient is φ = 126504978.

The previous prime is 126504953. The next prime is 126505009. The reversal of 126504979 is 979405621.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (979405621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 126504979 - 2⁵ = 126504947 is a prime.

It is not a weakly prime, because it can be changed into another prime (126504919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63252489 + 63252490.

It is an arithmetic number, because the mean of its divisors is an integer number (63252490).

Almost surely, 2^126504979 is an apocalyptic number.

126504979 is a deficient number, since it is larger than the sum of its proper divisors (1).

126504979 is an equidigital number, since it uses as much as digits as its factorization.

126504979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 126504979 is about 11247.4432205724. The cubic root of 126504979 is about 501.9986389068.

The spelling of 126504979 in words is "one hundred twenty-six million, five hundred four thousand, nine hundred seventy-nine".