126538660 has 12 divisors (see below), whose sum is σ = 265731228. Its totient is φ = 50615456.

The previous prime is 126538649. The next prime is 126538661. The reversal of 126538660 is 66835621.

It can be written as a sum of positive squares in 2 ways, for example, as 40271716 + 86266944 = 6346^2 + 9288^2 .

It is not an unprimeable number, because it can be changed into a prime (126538661) 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, 3163447 + ... + 3163486.

It is an arithmetic number, because the mean of its divisors is an integer number (22144269).

Almost surely, 2^126538660 is an apocalyptic number.

126538660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

126538660 is an abundant number, since it is smaller than the sum of its proper divisors (139192568).

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

126538660 is a wasteful number, since it uses less digits than its factorization.

126538660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6326942 (or 6326940 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 126538660 is about 11248.9403945438. The cubic root of 126538660 is about 502.0431860753.

The spelling of 126538660 in words is "one hundred twenty-six million, five hundred thirty-eight thousand, six hundred sixty".