134031521 has 4 divisors (see below), whose sum is σ = 144341652. Its totient is φ = 123721392.

The previous prime is 134031503. The next prime is 134031551. The reversal of 134031521 is 125130431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125130431 = 283 ⋅442157.

It can be written as a sum of positive squares in 2 ways, for example, as 34810000 + 99221521 = 5900^2 + 9961^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134031521 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 134031493 and 134031502.

It is not an unprimeable number, because it can be changed into a prime (134031551) 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, 5155046 + ... + 5155071.

It is an arithmetic number, because the mean of its divisors is an integer number (36085413).

Almost surely, 2^134031521 is an apocalyptic number.

It is an amenable number.

134031521 is a deficient number, since it is larger than the sum of its proper divisors (10310131).

134031521 is a wasteful number, since it uses less digits than its factorization.

134031521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10310130.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 134031521 is about 11577.1983225649. The cubic root of 134031521 is about 511.7631159746.

Adding to 134031521 its reverse (125130431), we get a palindrome (259161952).

The spelling of 134031521 in words is "one hundred thirty-four million, thirty-one thousand, five hundred twenty-one".