130521242 has 4 divisors (see below), whose sum is σ = 195781866. Its totient is φ = 65260620.

The previous prime is 130521227. The next prime is 130521247. The reversal of 130521242 is 242125031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 242125031 = 29 ⋅8349139.

It can be written as a sum of positive squares in only one way, i.e., 73805281 + 56715961 = 8591^2 + 7531^2 .

It is a super-2 number, since 2×130521242² = 34071589226445128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (130521247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32630309 + ... + 32630312.

Almost surely, 2^130521242 is an apocalyptic number.

130521242 is a deficient number, since it is larger than the sum of its proper divisors (65260624).

130521242 is an equidigital number, since it uses as much as digits as its factorization.

130521242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65260623.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 130521242 is about 11424.5893580470. The cubic root of 130521242 is about 507.2558518911.

Adding to 130521242 its reverse (242125031), we get a palindrome (372646273).

The spelling of 130521242 in words is "one hundred thirty million, five hundred twenty-one thousand, two hundred forty-two".