60540021 has 16 divisors (see below), whose sum is σ = 89819520. Its totient is φ = 40301280.

The previous prime is 60540019. The next prime is 60540037. The reversal of 60540021 is 12004506.

It is a happy number.

60540021 is a `hidden beast` number, since 605 + 40 + 0 + 21 = 666.

It is not a de Polignac number, because 60540021 - 2¹ = 60540019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 60539976 and 60540003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (60540091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25401 + ... + 27681.

It is an arithmetic number, because the mean of its divisors is an integer number (5613720).

Almost surely, 2^60540021 is an apocalyptic number.

It is an amenable number.

60540021 is a deficient number, since it is larger than the sum of its proper divisors (29279499).

60540021 is a wasteful number, since it uses less digits than its factorization.

60540021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3273 (or 3267 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 60540021 is about 7780.7468150557. The cubic root of 60540021 is about 392.6577639417.

Adding to 60540021 its reverse (12004506), we get a palindrome (72544527).

The spelling of 60540021 in words is "sixty million, five hundred forty thousand, twenty-one".