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130129 = 373517
BaseRepresentation
bin11111110001010001
320121111121
4133301101
513131004
62442241
71051246
oct376121
9217447
10130129
118984a
1263381
13472cc
14355cd
1528854
hex1fc51

130129 has 4 divisors (see below), whose sum is σ = 133684. Its totient is φ = 126576.

The previous prime is 130127. The next prime is 130147. The reversal of 130129 is 921031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 121104 + 9025 = 348^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 130129 - 21 = 130127 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (130121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722 + ... + 1795.

It is an arithmetic number, because the mean of its divisors is an integer number (33421).

2130129 is an apocalyptic number.

It is an amenable number.

130129 is a deficient number, since it is larger than the sum of its proper divisors (3555).

130129 is an equidigital number, since it uses as much as digits as its factorization.

130129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3554.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 130129 is about 360.7339740030. The cubic root of 130129 is about 50.6747207495.

The spelling of 130129 in words is "one hundred thirty thousand, one hundred twenty-nine".

Divisors: 1 37 3517 130129