2287861 has 2 divisors, whose sum is σ = 2287862. Its totient is φ = 2287860.

The previous prime is 2287823. The next prime is 2287871. The reversal of 2287861 is 1687822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2047761 + 240100 = 1431^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 2287861 - 2¹¹ = 2285813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2287811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1143930 + 1143931.

It is an arithmetic number, because the mean of its divisors is an integer number (1143931).

2^2287861 is an apocalyptic number.

It is an amenable number.

2287861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2287861 is an equidigital number, since it uses as much as digits as its factorization.

2287861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 34.

The square root of 2287861 is about 1512.5676844360. The cubic root of 2287861 is about 131.7679770042.

The spelling of 2287861 in words is "two million, two hundred eighty-seven thousand, eight hundred sixty-one".