134192561 has 2 divisors, whose sum is σ = 134192562. Its totient is φ = 134192560.

The previous prime is 134192501. The next prime is 134192563. The reversal of 134192561 is 165291431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68890000 + 65302561 = 8300^2 + 8081^2 .

It is a cyclic number.

It is not a de Polignac number, because 134192561 - 2²⁶ = 67083697 is a prime.

Together with 134192563, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_7602197 and since 134192561 and 7602197 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (134192563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67096280 + 67096281.

It is an arithmetic number, because the mean of its divisors is an integer number (67096281).

Almost surely, 2^134192561 is an apocalyptic number.

It is an amenable number.

134192561 is a deficient number, since it is larger than the sum of its proper divisors (1).

134192561 is an equidigital number, since it uses as much as digits as its factorization.

134192561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 32.

The square root of 134192561 is about 11584.1512852690. The cubic root of 134192561 is about 511.9679965042.

The spelling of 134192561 in words is "one hundred thirty-four million, one hundred ninety-two thousand, five hundred sixty-one".