65205601 has 4 divisors (see below), whose sum is σ = 67454100. Its totient is φ = 62957104.

The previous prime is 65205599. The next prime is 65205607. The reversal of 65205601 is 10650256.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40195600 + 25010001 = 6340^2 + 5001^2 .

It is a cyclic number.

It is not a de Polignac number, because 65205601 - 2¹ = 65205599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65205607) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1124206 + ... + 1124263.

It is an arithmetic number, because the mean of its divisors is an integer number (16863525).

Almost surely, 2^65205601 is an apocalyptic number.

It is an amenable number.

65205601 is a deficient number, since it is larger than the sum of its proper divisors (2248499).

65205601 is a wasteful number, since it uses less digits than its factorization.

65205601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2248498.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 65205601 is about 8074.9985139318. The cubic root of 65205601 is about 402.4960605558.

Adding to 65205601 its reverse (10650256), we get a palindrome (75855857).

It can be divided in two parts, 6520 and 5601, that added together give a palindrome (12121).

The spelling of 65205601 in words is "sixty-five million, two hundred five thousand, six hundred one".