65142320 has 20 divisors (see below), whose sum is σ = 151456080. Its totient is φ = 26056896.

The previous prime is 65142299. The next prime is 65142331. The reversal of 65142320 is 2324156.

It is a tau number, because it is divible by the number of its divisors (20).

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 407060 + ... + 407219.

It is an arithmetic number, because the mean of its divisors is an integer number (7572804).

Almost surely, 2^65142320 is an apocalyptic number.

It is an amenable number.

65142320 is an abundant number, since it is smaller than the sum of its proper divisors (86313760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65142320 is a wasteful number, since it uses less digits than its factorization.

65142320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814292 (or 814286 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 65142320 is about 8071.0792339067. The cubic root of 65142320 is about 402.3658130679.

Adding to 65142320 its reverse (2324156), we get a palindrome (67466476).

The spelling of 65142320 in words is "sixty-five million, one hundred forty-two thousand, three hundred twenty".