Adding to 65432121 its reverse (12123456), we get a palindrome (77555577).
65432121 is an esthetic number in base 10, because in such base its adjacent digits differ by 1.
It is a sphenic number, since it is the product of 3 distinct primes.
It is an alternating number because its digits alternate between even and odd.
It is a Curzon number.
Almost surely, 265432121 is an apocalyptic number.
It is an amenable number.
65432121 is a wasteful number, since it uses less digits than its factorization.
65432121 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 369735.
The square root of 65432121 is about 8089.0123624581. The cubic root of 65432121 is about 402.9616035598.
The spelling of 65432121 in words is "sixty-five million, four hundred thirty-two thousand, one hundred twenty-one".