60000021 has 20 divisors (see below), whose sum is σ = 94904172. Its totient is φ = 37646208.

The previous prime is 60000013. The next prime is 60000023. The reversal of 60000021 is 12000006.

60000021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 17892900 + 42107121 = 4230^2 + 6489^2 .

It is not a de Polignac number, because 60000021 - 2³ = 60000013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 59999958 and 60000012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60000023) 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 19 ways as a sum of consecutive naturals, for example, 20410 + ... + 23163.

Almost surely, 2^60000021 is an apocalyptic number.

It is an amenable number.

60000021 is a deficient number, since it is larger than the sum of its proper divisors (34904151).

60000021 is a wasteful number, since it uses less digits than its factorization.

60000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43602 (or 43593 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 60000021 is about 7745.9680479589. The cubic root of 60000021 is about 391.4868097903.

Adding to 60000021 its reverse (12000006), we get a palindrome (72000027).

The spelling of 60000021 in words is "sixty million, twenty-one", and thus it is an aban number and an uban number.