134256221 has 16 divisors (see below), whose sum is σ = 153249408. Its totient is φ = 116424000.

The previous prime is 134256203. The next prime is 134256247. The reversal of 134256221 is 122652431.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-134256221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134256251) 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, 176975 + ... + 177731.

It is an arithmetic number, because the mean of its divisors is an integer number (9578088).

Almost surely, 2^134256221 is an apocalyptic number.

134256221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

134256221 is a deficient number, since it is larger than the sum of its proper divisors (18993187).

134256221 is a wasteful number, since it uses less digits than its factorization.

134256221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1492.

The product of its digits is 2880, while the sum is 26.

The square root of 134256221 is about 11586.8986791117. The cubic root of 134256221 is about 512.0489417022.

The spelling of 134256221 in words is "one hundred thirty-four million, two hundred fifty-six thousand, two hundred twenty-one".