872345 has 4 divisors (see below), whose sum is σ = 1046820. Its totient is φ = 697872.

The previous prime is 872323. The next prime is 872351. The reversal of 872345 is 543278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543278 = 2 ⋅271639.

It can be written as a sum of positive squares in 2 ways, for example, as 369664 + 502681 = 608^2 + 709^2 .

It is a cyclic number.

It is not a de Polignac number, because 872345 - 2⁶ = 872281 is a prime.

It is an alternating number because its digits alternate between even and odd.

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, 87230 + ... + 87239.

It is an arithmetic number, because the mean of its divisors is an integer number (261705).

2⁸⁷²³⁴⁵ is an apocalyptic number.

It is an amenable number.

872345 is a deficient number, since it is larger than the sum of its proper divisors (174475).

872345 is a wasteful number, since it uses less digits than its factorization.

872345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174474.

The product of its digits is 6720, while the sum is 29.

The square root of 872345 is about 933.9941113305. The cubic root of 872345 is about 95.5497214654.

The spelling of 872345 in words is "eight hundred seventy-two thousand, three hundred forty-five".