60321721 has 2 divisors, whose sum is σ = 60321722. Its totient is φ = 60321720.

The previous prime is 60321719. The next prime is 60321731. The reversal of 60321721 is 12712306.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60279696 + 42025 = 7764^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 60321721 - 2¹ = 60321719 is a prime.

Together with 60321719, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 60321692 and 60321701.

It is not a weakly prime, because it can be changed into another prime (60321731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30160860 + 30160861.

It is an arithmetic number, because the mean of its divisors is an integer number (30160861).

Almost surely, 2^60321721 is an apocalyptic number.

It is an amenable number.

60321721 is a deficient number, since it is larger than the sum of its proper divisors (1).

60321721 is an equidigital number, since it uses as much as digits as its factorization.

60321721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 60321721 is about 7766.7059298006. The cubic root of 60321721 is about 392.1852367112.

The spelling of 60321721 in words is "sixty million, three hundred twenty-one thousand, seven hundred twenty-one".