2185987 has 2 divisors, whose sum is σ = 2185988. Its totient is φ = 2185986.

The previous prime is 2185973. The next prime is 2185999. The reversal of 2185987 is 7895812.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2185987 is a prime.

2185987 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2185907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092993 + 1092994.

It is an arithmetic number, because the mean of its divisors is an integer number (1092994).

2^2185987 is an apocalyptic number.

2185987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185987 is an equidigital number, since it uses as much as digits as its factorization.

2185987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 40.

The square root of 2185987 is about 1478.5083699459. The cubic root of 2185987 is about 129.7824170966.

The spelling of 2185987 in words is "two million, one hundred eighty-five thousand, nine hundred eighty-seven".