126521316 has 36 divisors (see below), whose sum is σ = 330848700. Its totient is φ = 40719168.

The previous prime is 126521309. The next prime is 126521333. The reversal of 126521316 is 613125621.

126521316 is a `hidden beast` number, since 1 + 2 + 652 + 1 + 3 + 1 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 89870400 + 36650916 = 9480^2 + 6054^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 126521316.

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, 59551 + ... + 61638.

Almost surely, 2^126521316 is an apocalyptic number.

It is an amenable number.

126521316 is an abundant number, since it is smaller than the sum of its proper divisors (204327384).

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

126521316 is a wasteful number, since it uses less digits than its factorization.

126521316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121228 (or 121223 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 126521316 is about 11248.1694510707. The cubic root of 126521316 is about 502.0202475392.

Adding to 126521316 its reverse (613125621), we get a palindrome (739646937).

The spelling of 126521316 in words is "one hundred twenty-six million, five hundred twenty-one thousand, three hundred sixteen".