134721161 has 2 divisors, whose sum is σ = 134721162. Its totient is φ = 134721160.

The previous prime is 134721137. The next prime is 134721217. The reversal of 134721161 is 161127431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127125625 + 7595536 = 11275^2 + 2756^2 .

It is an emirp because it is prime and its reverse (161127431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134721161 - 2¹⁴ = 134704777 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 134721161.

It is not a weakly prime, because it can be changed into another prime (134721101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67360580 + 67360581.

It is an arithmetic number, because the mean of its divisors is an integer number (67360581).

Almost surely, 2^134721161 is an apocalyptic number.

It is an amenable number.

134721161 is a deficient number, since it is larger than the sum of its proper divisors (1).

134721161 is an equidigital number, since it uses as much as digits as its factorization.

134721161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 26.

The square root of 134721161 is about 11606.9445161076. The cubic root of 134721161 is about 512.6393494561.

Adding to 134721161 its reverse (161127431), we get a palindrome (295848592).

The spelling of 134721161 in words is "one hundred thirty-four million, seven hundred twenty-one thousand, one hundred sixty-one".