65021602 has 4 divisors (see below), whose sum is σ = 97532406. Its totient is φ = 32510800.

The previous prime is 65021581. The next prime is 65021603. The reversal of 65021602 is 20612056.

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

It can be written as a sum of positive squares in only one way, i.e., 61136761 + 3884841 = 7819^2 + 1971^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (65021603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16255399 + ... + 16255402.

Almost surely, 2^65021602 is an apocalyptic number.

65021602 is a deficient number, since it is larger than the sum of its proper divisors (32510804).

65021602 is a wasteful number, since it uses less digits than its factorization.

65021602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32510803.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 65021602 is about 8063.5973361769. The cubic root of 65021602 is about 402.1171123193.

Adding to 65021602 its reverse (20612056), we get a palindrome (85633658).

The spelling of 65021602 in words is "sixty-five million, twenty-one thousand, six hundred two".