1872817 has 2 divisors, whose sum is σ = 1872818. Its totient is φ = 1872816.

The previous prime is 1872799. The next prime is 1872841. The reversal of 1872817 is 7182781.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1860496 + 12321 = 1364^2 + 111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1872817 - 2¹⁵ = 1840049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1872847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936408 + 936409.

It is an arithmetic number, because the mean of its divisors is an integer number (936409).

2^1872817 is an apocalyptic number.

It is an amenable number.

1872817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1872817 is an equidigital number, since it uses as much as digits as its factorization.

1872817 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 34.

The square root of 1872817 is about 1368.5090427177. The cubic root of 1872817 is about 123.2627296571.

The spelling of 1872817 in words is "one million, eight hundred seventy-two thousand, eight hundred seventeen".