60505721 has 4 divisors (see below), whose sum is σ = 60982272. Its totient is φ = 60029172.

The previous prime is 60505691. The next prime is 60505723. The reversal of 60505721 is 12750506.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12750506 = 2 ⋅6375253.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-60505721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (60505723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238085 + ... + 238338.

It is an arithmetic number, because the mean of its divisors is an integer number (15245568).

Almost surely, 2^60505721 is an apocalyptic number.

It is an amenable number.

60505721 is a deficient number, since it is larger than the sum of its proper divisors (476551).

60505721 is a wasteful number, since it uses less digits than its factorization.

60505721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 476550.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 60505721 is about 7778.5423441671. The cubic root of 60505721 is about 392.5835942414.

The spelling of 60505721 in words is "sixty million, five hundred five thousand, seven hundred twenty-one".