65432121 has 8 divisors (see below), whose sum is σ = 88721760. Its totient is φ = 42881952.

The previous prime is 65432119. The next prime is 65432153. The reversal of 65432121 is 12123456.

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 not a de Polignac number, because 65432121 - 2¹ = 65432119 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 65432091 and 65432100.

It is not an unprimeable number, because it can be changed into a prime (65432161) 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, 184660 + ... + 185013.

It is an arithmetic number, because the mean of its divisors is an integer number (11090220).

Almost surely, 2^65432121 is an apocalyptic number.

It is an amenable number.

65432121 is a deficient number, since it is larger than the sum of its proper divisors (23289639).

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 product of its digits is 1440, while the sum is 24.

The square root of 65432121 is about 8089.0123624581. The cubic root of 65432121 is about 402.9616035598.

Adding to 65432121 its reverse (12123456), we get a palindrome (77555577).

The spelling of 65432121 in words is "sixty-five million, four hundred thirty-two thousand, one hundred twenty-one".