130245520 has 40 divisors (see below), whose sum is σ = 310214520. Its totient is φ = 50826240.

The previous prime is 130245499. The next prime is 130245529. The reversal of 130245520 is 25542031.

It can be written as a sum of positive squares in 4 ways, for example, as 10036224 + 120209296 = 3168^2 + 10964^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 130245491 and 130245500.

It is not an unprimeable number, because it can be changed into a prime (130245529) by changing a digit.

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, 16575 + ... + 23134.

It is an arithmetic number, because the mean of its divisors is an integer number (7755363).

Almost surely, 2^130245520 is an apocalyptic number.

130245520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

130245520 is an abundant number, since it is smaller than the sum of its proper divisors (179969000).

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

130245520 is a wasteful number, since it uses less digits than its factorization.

130245520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39763 (or 39757 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 130245520 is about 11412.5159364620. The cubic root of 130245520 is about 506.8984127597.

Adding to 130245520 its reverse (25542031), we get a palindrome (155787551).

The spelling of 130245520 in words is "one hundred thirty million, two hundred forty-five thousand, five hundred twenty".