134123551 has 2 divisors, whose sum is σ = 134123552. Its totient is φ = 134123550.

The previous prime is 134123543. The next prime is 134123581. The reversal of 134123551 is 155321431.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 134123551 - 2³ = 134123543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134123501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67061775 + 67061776.

It is an arithmetic number, because the mean of its divisors is an integer number (67061776).

Almost surely, 2^134123551 is an apocalyptic number.

134123551 is a deficient number, since it is larger than the sum of its proper divisors (1).

134123551 is an equidigital number, since it uses as much as digits as its factorization.

134123551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 134123551 is about 11581.1722636355. The cubic root of 134123551 is about 511.8802197320.

Adding to 134123551 its reverse (155321431), we get a palindrome (289444982).

The spelling of 134123551 in words is "one hundred thirty-four million, one hundred twenty-three thousand, five hundred fifty-one".