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130538 = 265269
BaseRepresentation
bin11111110111101010
320122001202
4133313222
513134123
62444202
71052402
oct376752
9218052
10130538
118a091
1263662
1347555
1435802
1528a28
hex1fdea

130538 has 4 divisors (see below), whose sum is σ = 195810. Its totient is φ = 65268.

The previous prime is 130531. The next prime is 130547. The reversal of 130538 is 835031.

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

It can be written as a sum of positive squares in only one way, i.e., 124609 + 5929 = 353^2 + 77^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (130531) by changing a digit.

130538 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32633 + ... + 32636.

2130538 is an apocalyptic number.

130538 is a deficient number, since it is larger than the sum of its proper divisors (65272).

130538 is an equidigital number, since it uses as much as digits as its factorization.

130538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65271.

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

The square root of 130538 is about 361.3004290061. The cubic root of 130538 is about 50.7277560311.

Adding to 130538 its reverse (835031), we get a palindrome (965569).

The spelling of 130538 in words is "one hundred thirty thousand, five hundred thirty-eight".

Divisors: 1 2 65269 130538