60721457 has 2 divisors, whose sum is σ = 60721458. Its totient is φ = 60721456.

The previous prime is 60721429. The next prime is 60721459. The reversal of 60721457 is 75412706.

60721457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37834801 + 22886656 = 6151^2 + 4784^2 .

It is a cyclic number.

It is not a de Polignac number, because 60721457 - 2⁸ = 60721201 is a prime.

Together with 60721459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (60721459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30360728 + 30360729.

It is an arithmetic number, because the mean of its divisors is an integer number (30360729).

Almost surely, 2^60721457 is an apocalyptic number.

It is an amenable number.

60721457 is a deficient number, since it is larger than the sum of its proper divisors (1).

60721457 is an equidigital number, since it uses as much as digits as its factorization.

60721457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 60721457 is about 7792.3973846307. The cubic root of 60721457 is about 393.0496325552.

The spelling of 60721457 in words is "sixty million, seven hundred twenty-one thousand, four hundred fifty-seven".