2415866 has 4 divisors (see below), whose sum is σ = 3623802. Its totient is φ = 1207932.

The previous prime is 2415863. The next prime is 2415871. The reversal of 2415866 is 6685142.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6685142 = 2 ⋅3342571.

It can be written as a sum of positive squares in only one way, i.e., 1809025 + 606841 = 1345^2 + 779^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2415863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 603965 + ... + 603968.

2^2415866 is an apocalyptic number.

2415866 is a deficient number, since it is larger than the sum of its proper divisors (1207936).

2415866 is a wasteful number, since it uses less digits than its factorization.

2415866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1207935.

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

The square root of 2415866 is about 1554.3056327505. The cubic root of 2415866 is about 134.1809762310.

The spelling of 2415866 in words is "two million, four hundred fifteen thousand, eight hundred sixty-six".