135851 has 2 divisors, whose sum is σ = 135852. Its totient is φ = 135850.

The previous prime is 135841. The next prime is 135859. The reversal of 135851 is 158531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 135851 - 2⁶ = 135787 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67925 + 67926.

It is an arithmetic number, because the mean of its divisors is an integer number (67926).

2¹³⁵⁸⁵¹ is an apocalyptic number.

135851 is a deficient number, since it is larger than the sum of its proper divisors (1).

135851 is an equidigital number, since it uses as much as digits as its factorization.

135851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 600, while the sum is 23.

The square root of 135851 is about 368.5797064408. The cubic root of 135851 is about 51.4068445114.

The spelling of 135851 in words is "one hundred thirty-five thousand, eight hundred fifty-one".