864245 has 4 divisors (see below), whose sum is σ = 1037100. Its totient is φ = 691392.

The previous prime is 864223. The next prime is 864251. The reversal of 864245 is 542468.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 209764 + 654481 = 458^2 + 809^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-864245 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86420 + ... + 86429.

It is an arithmetic number, because the mean of its divisors is an integer number (259275).

2⁸⁶⁴²⁴⁵ is an apocalyptic number.

It is an amenable number.

864245 is a deficient number, since it is larger than the sum of its proper divisors (172855).

864245 is a wasteful number, since it uses less digits than its factorization.

864245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172854.

The product of its digits is 7680, while the sum is 29.

The square root of 864245 is about 929.6477827651. The cubic root of 864245 is about 95.2530648890.

The spelling of 864245 in words is "eight hundred sixty-four thousand, two hundred forty-five".