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130512 = 2432719
BaseRepresentation
bin11111110111010000
320122000210
4133313100
513134022
62444120
71052334
oct376720
9218023
10130512
118a068
1263640
1347535
14357c4
1528a0c
hex1fdd0

130512 has 20 divisors (see below), whose sum is σ = 337280. Its totient is φ = 43488.

The previous prime is 130489. The next prime is 130513. The reversal of 130512 is 215031.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130513) 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 3 ways as a sum of consecutive naturals, for example, 1312 + ... + 1407.

It is an arithmetic number, because the mean of its divisors is an integer number (16864).

2130512 is an apocalyptic number.

130512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

130512 is an abundant number, since it is smaller than the sum of its proper divisors (206768).

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

130512 is a wasteful number, since it uses less digits than its factorization.

130512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2730 (or 2724 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 130512 is about 361.2644460779. The cubic root of 130512 is about 50.7243878951.

Adding to 130512 its reverse (215031), we get a palindrome (345543).

The spelling of 130512 in words is "one hundred thirty thousand, five hundred twelve".

Divisors: 1 2 3 4 6 8 12 16 24 48 2719 5438 8157 10876 16314 21752 32628 43504 65256 130512