872517 has 4 divisors (see below), whose sum is σ = 1163360. Its totient is φ = 581676.

The previous prime is 872479. The next prime is 872533. The reversal of 872517 is 715278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 872517 - 2⁶ = 872453 is a prime.

It is a super-2 number, since 2×872517² = 1522571830578, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 872517.

It is not an unprimeable number, because it can be changed into a prime (872567) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145417 + ... + 145422.

It is an arithmetic number, because the mean of its divisors is an integer number (290840).

2⁸⁷²⁵¹⁷ is an apocalyptic number.

It is an amenable number.

872517 is a deficient number, since it is larger than the sum of its proper divisors (290843).

872517 is a wasteful number, since it uses less digits than its factorization.

872517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290842.

The product of its digits is 3920, while the sum is 30.

The square root of 872517 is about 934.0861844605. The cubic root of 872517 is about 95.5560008893.

The spelling of 872517 in words is "eight hundred seventy-two thousand, five hundred seventeen".