6895645 has 4 divisors (see below), whose sum is σ = 8274780. Its totient is φ = 5516512.

The previous prime is 6895643. The next prime is 6895657. The reversal of 6895645 is 5465986.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5465986 = 2 ⋅2732993.

It can be written as a sum of positive squares in 2 ways, for example, as 4761124 + 2134521 = 2182^2 + 1461^2 .

It is a cyclic number.

It is not a de Polignac number, because 6895645 - 2¹ = 6895643 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6895643) 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, 689560 + ... + 689569.

It is an arithmetic number, because the mean of its divisors is an integer number (2068695).

Almost surely, 2^6895645 is an apocalyptic number.

It is an amenable number.

6895645 is a deficient number, since it is larger than the sum of its proper divisors (1379135).

6895645 is a wasteful number, since it uses less digits than its factorization.

6895645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379134.

The product of its digits is 259200, while the sum is 43.

The square root of 6895645 is about 2625.9560163872. The cubic root of 6895645 is about 190.3377648473.

The spelling of 6895645 in words is "six million, eight hundred ninety-five thousand, six hundred forty-five".