134257521 has 16 divisors (see below), whose sum is σ = 185407488. Its totient is φ = 86360400.

The previous prime is 134257507. The next prime is 134257531. The reversal of 134257521 is 125752431.

It is not a de Polignac number, because 134257521 - 2⁶ = 134257457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (134257531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3306 + ... + 16716.

It is an arithmetic number, because the mean of its divisors is an integer number (11587968).

Almost surely, 2^134257521 is an apocalyptic number.

It is an amenable number.

134257521 is a deficient number, since it is larger than the sum of its proper divisors (51149967).

134257521 is a wasteful number, since it uses less digits than its factorization.

134257521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13532.

The product of its digits is 8400, while the sum is 30.

The square root of 134257521 is about 11586.9547768169. The cubic root of 134257521 is about 512.0505944163.

The spelling of 134257521 in words is "one hundred thirty-four million, two hundred fifty-seven thousand, five hundred twenty-one".