130142521 has 4 divisors (see below), whose sum is σ = 131004544. Its totient is φ = 129280500.

The previous prime is 130142513. The next prime is 130142527. The reversal of 130142521 is 125241031.

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: 125241031 = 1657 ⋅75583.

It is a cyclic number.

It is not a de Polignac number, because 130142521 - 2³ = 130142513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130142527) 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, 430785 + ... + 431086.

It is an arithmetic number, because the mean of its divisors is an integer number (32751136).

Almost surely, 2^130142521 is an apocalyptic number.

It is an amenable number.

130142521 is a deficient number, since it is larger than the sum of its proper divisors (862023).

130142521 is an equidigital number, since it uses as much as digits as its factorization.

130142521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862022.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 130142521 is about 11408.0024982466. The cubic root of 130142521 is about 506.7647580069.

Adding to 130142521 its reverse (125241031), we get a palindrome (255383552).

The spelling of 130142521 in words is "one hundred thirty million, one hundred forty-two thousand, five hundred twenty-one".