134340221 has 8 divisors (see below), whose sum is σ = 136596600. Its totient is φ = 132095232.

The previous prime is 134340197. The next prime is 134340223. The reversal of 134340221 is 122043431.

134340221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 36132121 + 98208100 = 6011^2 + 9910^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-134340221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 134340193 and 134340202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134340223) 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, 22841 + ... + 28113.

It is an arithmetic number, because the mean of its divisors is an integer number (17074575).

Almost surely, 2^134340221 is an apocalyptic number.

It is an amenable number.

134340221 is a deficient number, since it is larger than the sum of its proper divisors (2256379).

134340221 is an equidigital number, since it uses as much as digits as its factorization.

134340221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5695.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 134340221 is about 11590.5228958835. The cubic root of 134340221 is about 512.1557105442.

Adding to 134340221 its reverse (122043431), we get a palindrome (256383652).

The spelling of 134340221 in words is "one hundred thirty-four million, three hundred forty thousand, two hundred twenty-one".