65512120 has 32 divisors (see below), whose sum is σ = 148842720. Its totient is φ = 25948800.

The previous prime is 65512087. The next prime is 65512129. The reversal of 65512120 is 2121556.

It is a junction number, because it is equal to n+sod(n) for n = 65512091 and 65512100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65512129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3831 + ... + 12070.

It is an arithmetic number, because the mean of its divisors is an integer number (4651335).

Almost surely, 2^65512120 is an apocalyptic number.

It is an amenable number.

65512120 is an abundant number, since it is smaller than the sum of its proper divisors (83330600).

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

65512120 is a wasteful number, since it uses less digits than its factorization.

65512120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16015 (or 16011 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 65512120 is about 8093.9557695851. The cubic root of 65512120 is about 403.1257604296.

Adding to 65512120 its reverse (2121556), we get a palindrome (67633676).

The spelling of 65512120 in words is "sixty-five million, five hundred twelve thousand, one hundred twenty".