2251866 has 8 divisors (see below), whose sum is σ = 4503744. Its totient is φ = 750620.

The previous prime is 2251859. The next prime is 2251877. The reversal of 2251866 is 6681522.

It is a sphenic number, since it is the product of 3 distinct primes.

2251866 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 187650 + ... + 187661.

It is an arithmetic number, because the mean of its divisors is an integer number (562968).

2^2251866 is an apocalyptic number.

2251866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2251866 is a wasteful number, since it uses less digits than its factorization.

2251866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375316.

The product of its digits is 5760, while the sum is 30.

The square root of 2251866 is about 1500.6218710921. The cubic root of 2251866 is about 131.0732841709.

The spelling of 2251866 in words is "two million, two hundred fifty-one thousand, eight hundred sixty-six".