126503778 has 16 divisors (see below), whose sum is σ = 259178976. Its totient is φ = 41139360.

The previous prime is 126503759. The next prime is 126503779. The reversal of 126503778 is 877305621.

It is not an unprimeable number, because it can be changed into a prime (126503779) 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 7 ways as a sum of consecutive naturals, for example, 256876 + ... + 257367.

It is an arithmetic number, because the mean of its divisors is an integer number (16198686).

Almost surely, 2^126503778 is an apocalyptic number.

126503778 is an abundant number, since it is smaller than the sum of its proper divisors (132675198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

126503778 is a wasteful number, since it uses less digits than its factorization.

126503778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514289.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 126503778 is about 11247.3898305340. The cubic root of 126503778 is about 501.9970502940.

The spelling of 126503778 in words is "one hundred twenty-six million, five hundred three thousand, seven hundred seventy-eight".