872281 has 2 divisors, whose sum is σ = 872282. Its totient is φ = 872280.

The previous prime is 872269. The next prime is 872317. The reversal of 872281 is 182278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 793881 + 78400 = 891^2 + 280^2 .

It is a cyclic number.

It is not a de Polignac number, because 872281 - 2¹⁹ = 347993 is a prime.

It is a super-2 number, since 2×872281² = 1521748285922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (872231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436140 + 436141.

It is an arithmetic number, because the mean of its divisors is an integer number (436141).

2⁸⁷²²⁸¹ is an apocalyptic number.

It is an amenable number.

872281 is a deficient number, since it is larger than the sum of its proper divisors (1).

872281 is an equidigital number, since it uses as much as digits as its factorization.

872281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 28.

The square root of 872281 is about 933.9598492441. The cubic root of 872281 is about 95.5473847249.

Subtracting from 872281 its product of digits (1792), we obtain a square (870489 = 933²).

The spelling of 872281 in words is "eight hundred seventy-two thousand, two hundred eighty-one".