65121232 has 30 divisors (see below), whose sum is σ = 138689474. Its totient is φ = 29599680.

The previous prime is 65121187. The next prime is 65121239. The reversal of 65121232 is 23212156.

It can be written as a sum of positive squares in only one way, i.e., 41267776 + 23853456 = 6424^2 + 4884^2 .

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65121239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14883 + ... + 18754.

Almost surely, 2^65121232 is an apocalyptic number.

It is an amenable number.

65121232 is an abundant number, since it is smaller than the sum of its proper divisors (73568242).

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

65121232 is a wasteful number, since it uses less digits than its factorization.

65121232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33667 (or 33650 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 65121232 is about 8069.7727353377. The cubic root of 65121232 is about 402.3223901644.

Adding to 65121232 its reverse (23212156), we get a palindrome (88333388).

It can be divided in two parts, 6512 and 1232, that added together give a square (7744 = 88²).

The spelling of 65121232 in words is "sixty-five million, one hundred twenty-one thousand, two hundred thirty-two".