869445 has 18 divisors (see below), whose sum is σ = 1517958. Its totient is φ = 460368.

The previous prime is 869443. The next prime is 869461. The reversal of 869445 is 544968.

It can be written as a sum of positive squares in only one way, i.e., 695556 + 173889 = 834^2 + 417^2 .

It is not a de Polignac number, because 869445 - 2¹ = 869443 is a prime.

869445 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869443) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 6186 + ... + 6324.

It is an arithmetic number, because the mean of its divisors is an integer number (84331).

2⁸⁶⁹⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

869445 is a deficient number, since it is larger than the sum of its proper divisors (648513).

869445 is a wasteful number, since it uses less digits than its factorization.

869445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 147 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 869445 is about 932.4403466174. The cubic root of 869445 is about 95.4437229536.

The spelling of 869445 in words is "eight hundred sixty-nine thousand, four hundred forty-five".