65102421 has 8 divisors (see below), whose sum is σ = 87386400. Its totient is φ = 43110032.

The previous prime is 65102413. The next prime is 65102431. The reversal of 65102421 is 12420156.

65102421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 65102421 - 2³ = 65102413 is a prime.

It is a super-2 number, since 2×65102421² = 8476650440122482, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65102431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72375 + ... + 73268.

It is an arithmetic number, because the mean of its divisors is an integer number (10923300).

Almost surely, 2^65102421 is an apocalyptic number.

It is an amenable number.

65102421 is a deficient number, since it is larger than the sum of its proper divisors (22283979).

65102421 is a wasteful number, since it uses less digits than its factorization.

65102421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145795.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 65102421 is about 8068.6071288668. The cubic root of 65102421 is about 402.2836479853.

Adding to 65102421 its reverse (12420156), we get a palindrome (77522577).

The spelling of 65102421 in words is "sixty-five million, one hundred two thousand, four hundred twenty-one".