65245220 has 36 divisors (see below), whose sum is σ = 139075860. Its totient is φ = 25709184.

The previous prime is 65245217. The next prime is 65245223. The reversal of 65245220 is 2254256.

It is an interprime number because it is at equal distance from previous prime (65245217) and next prime (65245223).

It can be written as a sum of positive squares in 6 ways, for example, as 15570916 + 49674304 = 3946^2 + 7048^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 65245220.

It is not an unprimeable number, because it can be changed into a prime (65245223) 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 in 11 ways as a sum of consecutive naturals, for example, 377054 + ... + 377226.

Almost surely, 2^65245220 is an apocalyptic number.

It is an amenable number.

65245220 is an abundant number, since it is smaller than the sum of its proper divisors (73830640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65245220 is a wasteful number, since it uses less digits than its factorization.

65245220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 65245220 is about 8077.4513307107. The cubic root of 65245220 is about 402.5775630779.

Adding to 65245220 its reverse (2254256), we get a palindrome (67499476).

The spelling of 65245220 in words is "sixty-five million, two hundred forty-five thousand, two hundred twenty".