135806501 has 4 divisors (see below), whose sum is σ = 136307904. Its totient is φ = 135305100.

The previous prime is 135806491. The next prime is 135806527. The reversal of 135806501 is 105608531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 135806501 - 2²⁶ = 68697637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135806551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 250295 + ... + 250836.

It is an arithmetic number, because the mean of its divisors is an integer number (34076976).

Almost surely, 2^135806501 is an apocalyptic number.

It is an amenable number.

135806501 is a deficient number, since it is larger than the sum of its proper divisors (501403).

135806501 is an equidigital number, since it uses as much as digits as its factorization.

135806501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501402.

The product of its (nonzero) digits is 3600, while the sum is 29.

The square root of 135806501 is about 11653.6046354765. The cubic root of 135806501 is about 514.0123100102.

The spelling of 135806501 in words is "one hundred thirty-five million, eight hundred six thousand, five hundred one".