65871225 has 72 divisors (see below), whose sum is σ = 139921600. Its totient is φ = 30093120.

The previous prime is 65871193. The next prime is 65871229. The reversal of 65871225 is 52217856.

It is a happy number.

It is not a de Polignac number, because 65871225 - 2⁵ = 65871193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 65871225.

It is not an unprimeable number, because it can be changed into a prime (65871229) 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 71 ways as a sum of consecutive naturals, for example, 41751 + ... + 43299.

Almost surely, 2^65871225 is an apocalyptic number.

It is an amenable number.

65871225 is an abundant number, since it is smaller than the sum of its proper divisors (74050375).

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

65871225 is a wasteful number, since it uses less digits than its factorization.

65871225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581 (or 1564 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 65871225 is about 8116.1089815256. The cubic root of 65871225 is about 403.8609972566.

The spelling of 65871225 in words is "sixty-five million, eight hundred seventy-one thousand, two hundred twenty-five".