65141040 has 80 divisors (see below), whose sum is σ = 202888800. Its totient is φ = 17289216.

The previous prime is 65141017. The next prime is 65141057. The reversal of 65141040 is 4014156.

It is a Cunningham number, because it is equal to 8071²-1.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 65140998 and 65141016.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64056 + ... + 65064.

It is an arithmetic number, because the mean of its divisors is an integer number (2536110).

Almost surely, 2^65141040 is an apocalyptic number.

65141040 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65141040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101444400).

65141040 is an abundant number, since it is smaller than the sum of its proper divisors (137747760).

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

65141040 is a wasteful number, since it uses less digits than its factorization.

65141040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1294 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 65141040 is about 8070.9999380498. Note that the first 4 decimals coincide. The cubic root of 65141040 is about 402.3631776505.

Adding to 65141040 its reverse (4014156), we get a palindrome (69155196).

The spelling of 65141040 in words is "sixty-five million, one hundred forty-one thousand, forty".