65038261 has 8 divisors (see below), whose sum is σ = 67355064. Its totient is φ = 62761920.

The previous prime is 65038247. The next prime is 65038297. The reversal of 65038261 is 16283056.

It can be written as a sum of positive squares in 4 ways, for example, as 155236 + 64883025 = 394^2 + 8055^2 .

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 65038261 - 2⁷ = 65038133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65038241) 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, 6826 + ... + 13291.

It is an arithmetic number, because the mean of its divisors is an integer number (8419383).

Almost surely, 2^65038261 is an apocalyptic number.

65038261 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

65038261 is a deficient number, since it is larger than the sum of its proper divisors (2316803).

65038261 is a wasteful number, since it uses less digits than its factorization.

65038261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20231.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 65038261 is about 8064.6302457087. The cubic root of 65038261 is about 402.1514511480.

The spelling of 65038261 in words is "sixty-five million, thirty-eight thousand, two hundred sixty-one".