65130140 has 24 divisors (see below), whose sum is σ = 140110992. Its totient is φ = 25416320.

The previous prime is 65130137. The next prime is 65130173. The reversal of 65130140 is 4103156.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38894 + ... + 40533.

It is an arithmetic number, because the mean of its divisors is an integer number (5837958).

Almost surely, 2^65130140 is an apocalyptic number.

It is an amenable number.

65130140 is an abundant number, since it is smaller than the sum of its proper divisors (74980852).

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

65130140 is a wasteful number, since it uses less digits than its factorization.

65130140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79477 (or 79475 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 65130140 is about 8070.3246527014. The cubic root of 65130140 is about 402.3407340252.

Adding to 65130140 its reverse (4103156), we get a palindrome (69233296).

The spelling of 65130140 in words is "sixty-five million, one hundred thirty thousand, one hundred forty".