135951 has 4 divisors (see below), whose sum is σ = 181272. Its totient is φ = 90632.

The previous prime is 135937. The next prime is 135977. The reversal of 135951 is 159531.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 135951 - 2⁶ = 135887 is a prime.

It is a D-number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22656 + ... + 22661.

It is an arithmetic number, because the mean of its divisors is an integer number (45318).

2¹³⁵⁹⁵¹ is an apocalyptic number.

135951 is a deficient number, since it is larger than the sum of its proper divisors (45321).

135951 is an equidigital number, since it uses as much as digits as its factorization.

135951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45320.

The product of its digits is 675, while the sum is 24.

The square root of 135951 is about 368.7153373539. The cubic root of 135951 is about 51.4194549537.

The spelling of 135951 in words is "one hundred thirty-five thousand, nine hundred fifty-one".