130421520 has 60 divisors (see below), whose sum is σ = 438001356. Its totient is φ = 34778880.

The previous prime is 130421503. The next prime is 130421527. The reversal of 130421520 is 25124031.

It can be written as a sum of positive squares in 2 ways, for example, as 21678336 + 108743184 = 4656^2 + 10428^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-2 number, since 2×130421520² = 34019545758220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 130421493 and 130421502.

It is not an unprimeable number, because it can be changed into a prime (130421527) 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 11 ways as a sum of consecutive naturals, for example, 89851 + ... + 91290.

Almost surely, 2^130421520 is an apocalyptic number.

130421520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130421520 is an abundant number, since it is smaller than the sum of its proper divisors (307579836).

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

130421520 is a wasteful number, since it uses less digits than its factorization.

130421520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181160 (or 181151 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 130421520 is about 11420.2241659260. The cubic root of 130421520 is about 507.1266329343.

Adding to 130421520 its reverse (25124031), we get a palindrome (155545551).

The spelling of 130421520 in words is "one hundred thirty million, four hundred twenty-one thousand, five hundred twenty".