134403521 has 8 divisors (see below), whose sum is σ = 156739200. Its totient is φ = 115202724.

The previous prime is 134403517. The next prime is 134403523. The reversal of 134403521 is 125304431.

It is not a de Polignac number, because 134403521 - 2² = 134403517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134403523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195581 + ... + 196266.

It is an arithmetic number, because the mean of its divisors is an integer number (19592400).

Almost surely, 2^134403521 is an apocalyptic number.

It is an amenable number.

134403521 is a deficient number, since it is larger than the sum of its proper divisors (22335679).

134403521 is an frugal number, since it uses more digits than its factorization.

134403521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391868 (or 391854 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 134403521 is about 11593.2532535091. The cubic root of 134403521 is about 512.2361390901.

Adding to 134403521 its reverse (125304431), we get a palindrome (259707952).

It can be divided in two parts, 13440 and 3521, that added together give a palindrome (16961).

The spelling of 134403521 in words is "one hundred thirty-four million, four hundred three thousand, five hundred twenty-one".