126871780 has 36 divisors (see below), whose sum is σ = 309932028. Its totient is φ = 43498560.

The previous prime is 126871777. The next prime is 126871793. The reversal of 126871780 is 87178621.

It can be written as a sum of positive squares in 2 ways, for example, as 28901376 + 97970404 = 5376^2 + 9898^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63751 + ... + 65710.

It is an arithmetic number, because the mean of its divisors is an integer number (8609223).

Almost surely, 2^126871780 is an apocalyptic number.

126871780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126871780 is an abundant number, since it is smaller than the sum of its proper divisors (183060248).

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

126871780 is a wasteful number, since it uses less digits than its factorization.

126871780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129484 (or 129475 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 40.

The square root of 126871780 is about 11263.7373904047. The cubic root of 126871780 is about 502.4833521708.

The spelling of 126871780 in words is "one hundred twenty-six million, eight hundred seventy-one thousand, seven hundred eighty".