65238621 has 8 divisors (see below), whose sum is σ = 99411264. Its totient is φ = 37279200.

The previous prime is 65238617. The next prime is 65238623. The reversal of 65238621 is 12683256.

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

It is not a de Polignac number, because 65238621 - 2² = 65238617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65238623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1553280 + ... + 1553321.

It is an arithmetic number, because the mean of its divisors is an integer number (12426408).

Almost surely, 2^65238621 is an apocalyptic number.

It is an amenable number.

65238621 is a deficient number, since it is larger than the sum of its proper divisors (34172643).

65238621 is a wasteful number, since it uses less digits than its factorization.

65238621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3106611.

The product of its digits is 17280, while the sum is 33.

The square root of 65238621 is about 8077.0428375737. The cubic root of 65238621 is about 402.5639901863.

The spelling of 65238621 in words is "sixty-five million, two hundred thirty-eight thousand, six hundred twenty-one".