134240521 has 4 divisors (see below), whose sum is σ = 134876944. Its totient is φ = 133604100.

The previous prime is 134240471. The next prime is 134240527. The reversal of 134240521 is 125042431.

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: 125042431 = 71 ⋅1761161.

It is a cyclic number.

It is not a de Polignac number, because 134240521 - 2¹⁵ = 134207753 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 134240492 and 134240501.

It is not an unprimeable number, because it can be changed into a prime (134240527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 317895 + ... + 318316.

It is an arithmetic number, because the mean of its divisors is an integer number (33719236).

Almost surely, 2^134240521 is an apocalyptic number.

It is an amenable number.

134240521 is a deficient number, since it is larger than the sum of its proper divisors (636423).

134240521 is an equidigital number, since it uses as much as digits as its factorization.

134240521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636422.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 134240521 is about 11586.2211699933. The cubic root of 134240521 is about 512.0289811578.

Adding to 134240521 its reverse (125042431), we get a palindrome (259282952).

The spelling of 134240521 in words is "one hundred thirty-four million, two hundred forty thousand, five hundred twenty-one".