1871249 has 2 divisors, whose sum is σ = 1871250. Its totient is φ = 1871248.

The previous prime is 1871213. The next prime is 1871263. The reversal of 1871249 is 9421781.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1803649 + 67600 = 1343^2 + 260^2 .

It is a cyclic number.

It is not a de Polignac number, because 1871249 - 2²⁰ = 822673 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1871279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 935624 + 935625.

It is an arithmetic number, because the mean of its divisors is an integer number (935625).

2^1871249 is an apocalyptic number.

It is an amenable number.

1871249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1871249 is an equidigital number, since it uses as much as digits as its factorization.

1871249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 1871249 is about 1367.9360365163. The cubic root of 1871249 is about 123.2283198305.

The spelling of 1871249 in words is "one million, eight hundred seventy-one thousand, two hundred forty-nine".