60721505 has 16 divisors (see below), whose sum is σ = 81179280. Its totient is φ = 43292928.

The previous prime is 60721489. The next prime is 60721519. The reversal of 60721505 is 50512706.

60721505 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 8 ways, for example, as 6241 + 60715264 = 79^2 + 7792^2 .

It is a cyclic number.

It is not a de Polignac number, because 60721505 - 2⁴ = 60721489 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 14222 + ... + 17991.

It is an arithmetic number, because the mean of its divisors is an integer number (5073705).

Almost surely, 2^60721505 is an apocalyptic number.

60721505 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

60721505 is a deficient number, since it is larger than the sum of its proper divisors (20457775).

60721505 is a wasteful number, since it uses less digits than its factorization.

60721505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32260.

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

The square root of 60721505 is about 7792.4004645552. The cubic root of 60721505 is about 393.0497361230.

The spelling of 60721505 in words is "sixty million, seven hundred twenty-one thousand, five hundred five".