135861005 has 8 divisors (see below), whose sum is σ = 186323712. Its totient is φ = 93161808.

The previous prime is 135860981. The next prime is 135861071. The reversal of 135861005 is 500168531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135861005 - 2¹⁰ = 135859981 is a prime.

It is a super-2 number, since 2×135861005² = 36916425359220050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1940837 + ... + 1940906.

It is an arithmetic number, because the mean of its divisors is an integer number (23290464).

Almost surely, 2^135861005 is an apocalyptic number.

It is an amenable number.

135861005 is a deficient number, since it is larger than the sum of its proper divisors (50462707).

135861005 is an equidigital number, since it uses as much as digits as its factorization.

135861005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881755.

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

The square root of 135861005 is about 11655.9429048018. The cubic root of 135861005 is about 514.0810646468.

The spelling of 135861005 in words is "one hundred thirty-five million, eight hundred sixty-one thousand, five".