2501866 has 8 divisors (see below), whose sum is σ = 3854340. Its totient is φ = 1217088.

The previous prime is 2501843. The next prime is 2501881. The reversal of 2501866 is 6681052.

2501866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2337841 + 164025 = 1529^2 + 405^2 .

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

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 16831 + ... + 16978.

2^2501866 is an apocalyptic number.

2501866 is a deficient number, since it is larger than the sum of its proper divisors (1352474).

2501866 is a wasteful number, since it uses less digits than its factorization.

2501866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33848.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 2501866 is about 1581.7288010275. The cubic root of 2501866 is about 135.7546397871.

It can be divided in two parts, 250 and 1866, that added together give a square (2116 = 46²).

The spelling of 2501866 in words is "two million, five hundred one thousand, eight hundred sixty-six".