2451866 has 4 divisors (see below), whose sum is σ = 3677802. Its totient is φ = 1225932.

The previous prime is 2451857. The next prime is 2451871. The reversal of 2451866 is 6681542.

2451866 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1274641 + 1177225 = 1129^2 + 1085^2 .

It is a Curzon number.

It is a plaindrome in base 16.

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 as a sum of consecutive naturals, namely, 612965 + ... + 612968.

2^2451866 is an apocalyptic number.

2451866 is a deficient number, since it is larger than the sum of its proper divisors (1225936).

2451866 is a wasteful number, since it uses less digits than its factorization.

2451866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1225935.

The product of its digits is 11520, while the sum is 32.

The square root of 2451866 is about 1565.8435426313. The cubic root of 2451866 is about 134.8441915298.

The spelling of 2451866 in words is "two million, four hundred fifty-one thousand, eight hundred sixty-six".