65421535 has 8 divisors (see below), whose sum is σ = 81213120. Its totient is φ = 50532384.

The previous prime is 65421529. The next prime is 65421571. The reversal of 65421535 is 53512456.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 65421535 - 2²¹ = 63324383 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 65421497 and 65421506.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 225447 + ... + 225736.

It is an arithmetic number, because the mean of its divisors is an integer number (10151640).

Almost surely, 2^65421535 is an apocalyptic number.

65421535 is a deficient number, since it is larger than the sum of its proper divisors (15791585).

65421535 is a wasteful number, since it uses less digits than its factorization.

65421535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451217.

The product of its digits is 18000, while the sum is 31.

The square root of 65421535 is about 8088.3579915827. The cubic root of 65421535 is about 402.9398712081.

It can be divided in two parts, 65421 and 535, that added together give a palindrome (65956).

The spelling of 65421535 in words is "sixty-five million, four hundred twenty-one thousand, five hundred thirty-five".