65282721 has 8 divisors (see below), whose sum is σ = 99478464. Its totient is φ = 37304400.

The previous prime is 65282719. The next prime is 65282731. The reversal of 65282721 is 12728256.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65282721 - 2¹ = 65282719 is a prime.

It is a super-2 number, since 2×65282721² = 8523667322327682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (65282731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1554330 + ... + 1554371.

It is an arithmetic number, because the mean of its divisors is an integer number (12434808).

Almost surely, 2^65282721 is an apocalyptic number.

It is an amenable number.

65282721 is a deficient number, since it is larger than the sum of its proper divisors (34195743).

65282721 is a wasteful number, since it uses less digits than its factorization.

65282721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3108711.

The product of its digits is 13440, while the sum is 33.

The square root of 65282721 is about 8079.7723359016. The cubic root of 65282721 is about 402.6546781507.

The spelling of 65282721 in words is "sixty-five million, two hundred eighty-two thousand, seven hundred twenty-one".