130821712 has 40 divisors (see below), whose sum is σ = 290247296. Its totient is φ = 55956096.

The previous prime is 130821701. The next prime is 130821739. The reversal of 130821712 is 217128031.

It is a happy number.

It is a super-2 number, since 2×130821712² = 34228640661221888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable 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 in 7 ways as a sum of consecutive naturals, for example, 84013 + ... + 85555.

Almost surely, 2^130821712 is an apocalyptic number.

It is an amenable number.

130821712 is an abundant number, since it is smaller than the sum of its proper divisors (159425584).

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

130821712 is a wasteful number, since it uses less digits than its factorization.

130821712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2315 (or 2309 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 130821712 is about 11437.7319430034. The cubic root of 130821712 is about 507.6448009891.

Adding to 130821712 its reverse (217128031), we get a palindrome (347949743).

The spelling of 130821712 in words is "one hundred thirty million, eight hundred twenty-one thousand, seven hundred twelve".