872445 has 24 divisors (see below), whose sum is σ = 1625184. Its totient is φ = 398496.

The previous prime is 872441. The next prime is 872453. The reversal of 872445 is 544278.

It is not a de Polignac number, because 872445 - 2² = 872441 is a prime.

It is a super-2 number, since 2×872445² = 1522320556050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872441) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142 + ... + 1328.

It is an arithmetic number, because the mean of its divisors is an integer number (67716).

2⁸⁷²⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

872445 is a deficient number, since it is larger than the sum of its proper divisors (752739).

872445 is a wasteful number, since it uses less digits than its factorization.

872445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209 (or 1202 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 872445 is about 934.0476433245. The cubic root of 872445 is about 95.5533723937.

The spelling of 872445 in words is "eight hundred seventy-two thousand, four hundred forty-five".