130045521 has 4 divisors (see below), whose sum is σ = 173394032. Its totient is φ = 86697012.

The previous prime is 130045477. The next prime is 130045549. The reversal of 130045521 is 125540031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125540031 = 3 ⋅41846677.

It is not a de Polignac number, because 130045521 - 2⁶ = 130045457 is a prime.

It is a super-2 number, since 2×130045521² = 33823675064322882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130045021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21674251 + ... + 21674256.

It is an arithmetic number, because the mean of its divisors is an integer number (43348508).

Almost surely, 2^130045521 is an apocalyptic number.

It is an amenable number.

130045521 is a deficient number, since it is larger than the sum of its proper divisors (43348511).

130045521 is an equidigital number, since it uses as much as digits as its factorization.

130045521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43348510.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 130045521 is about 11403.7503041763. The cubic root of 130045521 is about 506.6388232525.

Adding to 130045521 its reverse (125540031), we get a palindrome (255585552).

The spelling of 130045521 in words is "one hundred thirty million, forty-five thousand, five hundred twenty-one".