• 130 can be written using four 4's:
130 has 8 divisors (see below), whose sum is σ = 252. Its totient is φ = 48.
The previous prime is 127. The next prime is 131. The reversal of 130 is 31.
It is a happy number.
130 is nontrivially palindromic in base 3, base 4, base 8 and base 12.
130 is an esthetic number in base 5, because in such base its adjacent digits differ by 1.
It can be written as a sum of positive squares in 2 ways, for example, as 121 + 9 = 11^2 + 3^2 .
It is a sphenic number, since it is the product of 3 distinct primes.
130 is an idoneal number.
It is a magnanimous number.
It is a cake number, because a cake can be divided into 130 parts by 9 planar cuts.
130 is an undulating number in base 5 and base 8.
130 is a nontrivial repdigit in base 12.
It is a plaindrome in base 6, base 7, base 12 and base 15.
It is a nialpdrome in base 12, base 13, base 14 and base 16.
It is a zygodrome in base 12.
It is a pernicious number, because its binary representation contains a prime number (2) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4 + ... + 16.
130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.
130 is a deficient number, since it is larger than the sum of its proper divisors (122).
130 is a wasteful number, since it uses less digits than its factorization.
130 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 20.
The product of its (nonzero) digits is 3, while the sum is 4.
The square root of 130 is about 11.4017542510. The cubic root of 130 is about 5.0657970191.
Adding to 130 its reverse (31), we get a palindrome (161).
Subtracting from 130 its reverse (31), we obtain a palindrome (99).
The spelling of 130 in words is "one hundred thirty", and thus it is an aban number.
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