872549 has 2 divisors, whose sum is σ = 872550. Its totient is φ = 872548.

The previous prime is 872533. The next prime is 872561. The reversal of 872549 is 945278.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504100 + 368449 = 710^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 872549 - 2⁴ = 872533 is a prime.

It is a super-2 number, since 2×872549² = 1522683514802, which contains 22 as substring.

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

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 872549.

It is not a weakly prime, because it can be changed into another prime (872149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436274 + 436275.

It is an arithmetic number, because the mean of its divisors is an integer number (436275).

2⁸⁷²⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

872549 is a deficient number, since it is larger than the sum of its proper divisors (1).

872549 is an equidigital number, since it uses as much as digits as its factorization.

872549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 872549 is about 934.1033133439. The cubic root of 872549 is about 95.5571690632.

The spelling of 872549 in words is "eight hundred seventy-two thousand, five hundred forty-nine".