872149 has 2 divisors, whose sum is σ = 872150. Its totient is φ = 872148.

The previous prime is 872143. The next prime is 872159. The reversal of 872149 is 941278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 651249 + 220900 = 807^2 + 470^2 .

It is a cyclic number.

It is not a de Polignac number, because 872149 - 2³ = 872141 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 872149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436074 + 436075.

It is an arithmetic number, because the mean of its divisors is an integer number (436075).

2⁸⁷²¹⁴⁹ is an apocalyptic number.

It is an amenable number.

872149 is a deficient number, since it is larger than the sum of its proper divisors (1).

872149 is an equidigital number, since it uses as much as digits as its factorization.

872149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 31.

The square root of 872149 is about 933.8891797210. The cubic root of 872149 is about 95.5425648366.

The spelling of 872149 in words is "eight hundred seventy-two thousand, one hundred forty-nine".