107645 has 4 divisors (see below), whose sum is σ = 129180. Its totient is φ = 86112.

The previous prime is 107641. The next prime is 107647. The reversal of 107645 is 546701.

107645 = T₂₀₅ + T₂₀₆ + ... + T₂₀₉.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 546701 = 211 ⋅2591.

It can be written as a sum of positive squares in 2 ways, for example, as 27556 + 80089 = 166^2 + 283^2 .

It is a cyclic number.

It is not a de Polignac number, because 107645 - 2² = 107641 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 107645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107641) 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, 10760 + ... + 10769.

It is an arithmetic number, because the mean of its divisors is an integer number (32295).

2¹⁰⁷⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

107645 is a deficient number, since it is larger than the sum of its proper divisors (21535).

107645 is an equidigital number, since it uses as much as digits as its factorization.

107645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21534.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 107645 is about 328.0929746276. The cubic root of 107645 is about 47.5697958231.

The spelling of 107645 in words is "one hundred seven thousand, six hundred forty-five".