2415891 has 4 divisors (see below), whose sum is σ = 3221192. Its totient is φ = 1610592.

The previous prime is 2415871. The next prime is 2415893. The reversal of 2415891 is 1985142.

It is a happy number.

2415891 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 is not a de Polignac number, because 2415891 - 2⁵ = 2415859 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2415893) by changing a digit.

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, 402646 + ... + 402651.

It is an arithmetic number, because the mean of its divisors is an integer number (805298).

2^2415891 is an apocalyptic number.

2415891 is a deficient number, since it is larger than the sum of its proper divisors (805301).

2415891 is an equidigital number, since it uses as much as digits as its factorization.

2415891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 805300.

The product of its digits is 2880, while the sum is 30.

The square root of 2415891 is about 1554.3136749061. The cubic root of 2415891 is about 134.1814390757.

The spelling of 2415891 in words is "two million, four hundred fifteen thousand, eight hundred ninety-one".