2187247 has 2 divisors, whose sum is σ = 2187248. Its totient is φ = 2187246.

The previous prime is 2187233. The next prime is 2187259. The reversal of 2187247 is 7427812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2187247 - 2¹¹ = 2185199 is a prime.

2187247 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2187217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093623 + 1093624.

It is an arithmetic number, because the mean of its divisors is an integer number (1093624).

2^2187247 is an apocalyptic number.

2187247 is a deficient number, since it is larger than the sum of its proper divisors (1).

2187247 is an equidigital number, since it uses as much as digits as its factorization.

2187247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 31.

The square root of 2187247 is about 1478.9344136912. The cubic root of 2187247 is about 129.8073477781.

The spelling of 2187247 in words is "two million, one hundred eighty-seven thousand, two hundred forty-seven".