136945 has 8 divisors (see below), whose sum is σ = 167400. Its totient is φ = 107520.

The previous prime is 136943. The next prime is 136949. The reversal of 136945 is 549631.

136945 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 784 + 136161 = 28^2 + 369^2 .

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

It is not a de Polignac number, because 136945 - 2¹ = 136943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (136943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 529.

It is an arithmetic number, because the mean of its divisors is an integer number (20925).

136945 is a Friedman number, since it can be written as 6^3*(9+5^4)+1, using all its digits and the basic arithmetic operations.

2¹³⁶⁹⁴⁵ is an apocalyptic number.

It is an amenable number.

136945 is a deficient number, since it is larger than the sum of its proper divisors (30455).

136945 is an equidigital number, since it uses as much as digits as its factorization.

136945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515.

The product of its digits is 3240, while the sum is 28.

The square root of 136945 is about 370.0608058144. The cubic root of 136945 is about 51.5444678299.

Adding to 136945 its product of digits (3240), we get a triangular number (140185 = T₅₂₉).

Subtracting 136945 from its reverse (549631), we obtain a triangular number (412686 = T₉₀₈).

It can be divided in two parts, 136 and 945, that added together give a triangular number (1081 = T₄₆).

The spelling of 136945 in words is "one hundred thirty-six thousand, nine hundred forty-five".