134637221 has 4 divisors (see below), whose sum is σ = 134673132. Its totient is φ = 134601312.

The previous prime is 134637203. The next prime is 134637277. The reversal of 134637221 is 122736431.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122736431 = 1087 ⋅112913.

It can be written as a sum of positive squares in 2 ways, for example, as 36844900 + 97792321 = 6070^2 + 9889^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134637221 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 (134637521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11576 + ... + 20081.

It is an arithmetic number, because the mean of its divisors is an integer number (33668283).

Almost surely, 2^134637221 is an apocalyptic number.

It is an amenable number.

134637221 is a deficient number, since it is larger than the sum of its proper divisors (35911).

134637221 is an equidigital number, since it uses as much as digits as its factorization.

134637221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35910.

The product of its digits is 6048, while the sum is 29.

The square root of 134637221 is about 11603.3280139794. The cubic root of 134637221 is about 512.5328581749.

The spelling of 134637221 in words is "one hundred thirty-four million, six hundred thirty-seven thousand, two hundred twenty-one".