126817650 has 120 divisors (see below), whose sum is σ = 356360004. Its totient is φ = 33436800.

The previous prime is 126817643. The next prime is 126817651. The reversal of 126817650 is 56718621.

It can be written as a sum of positive squares in 6 ways, for example, as 33907329 + 92910321 = 5823^2 + 9639^2 .

It is not an unprimeable number, because it can be changed into a prime (126817651) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 700560 + ... + 700740.

Almost surely, 2^126817650 is an apocalyptic number.

126817650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 126817650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178180002).

126817650 is an abundant number, since it is smaller than the sum of its proper divisors (229542354).

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

126817650 is a wasteful number, since it uses less digits than its factorization.

126817650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 126817650 is about 11261.3342903938. The cubic root of 126817650 is about 502.4118802932.

The spelling of 126817650 in words is "one hundred twenty-six million, eight hundred seventeen thousand, six hundred fifty".