872497 has 4 divisors (see below), whose sum is σ = 896116. Its totient is φ = 848880.

The previous prime is 872479. The next prime is 872533. The reversal of 872497 is 794278.

It is a happy number.

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 531441 + 341056 = 729^2 + 584^2 .

It is a cyclic number.

It is not a de Polignac number, because 872497 - 2⁷ = 872369 is a prime.

It is a super-2 number, since 2×872497² = 1522502030018, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 23581 = 872497 / (8 + 7 + 2 + 4 + 9 + 7).

It is a Duffinian number.

872497 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (872437) 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, 11754 + ... + 11827.

It is an arithmetic number, because the mean of its divisors is an integer number (224029).

2⁸⁷²⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

872497 is a deficient number, since it is larger than the sum of its proper divisors (23619).

872497 is a wasteful number, since it uses less digits than its factorization.

872497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23618.

The product of its digits is 28224, while the sum is 37.

The square root of 872497 is about 934.0754787489. The cubic root of 872497 is about 95.5552707661. Note that the first 3 decimals are identical.

It can be divided in two parts, 872 and 497, that added together give a square (1369 = 37²).

The spelling of 872497 in words is "eight hundred seventy-two thousand, four hundred ninety-seven".