2418391 has 4 divisors (see below), whose sum is σ = 2436984. Its totient is φ = 2399800.

The previous prime is 2418389. The next prime is 2418401. The reversal of 2418391 is 1938142.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1938142 = 2 ⋅969071.

It is a cyclic number.

It is not a de Polignac number, because 2418391 - 2¹ = 2418389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2418791) 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 in 3 ways as a sum of consecutive naturals, for example, 9100 + ... + 9361.

It is an arithmetic number, because the mean of its divisors is an integer number (609246).

2^2418391 is an apocalyptic number.

2418391 is a deficient number, since it is larger than the sum of its proper divisors (18593).

2418391 is a wasteful number, since it uses less digits than its factorization.

2418391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18592.

The product of its digits is 1728, while the sum is 28.

The square root of 2418391 is about 1555.1176804345. The cubic root of 2418391 is about 134.2277074371.

Subtracting from 2418391 its reverse (1938142), we obtain a square (480249 = 693²).

It can be divided in two parts, 2418 and 391, that added together give a square (2809 = 53²).

The spelling of 2418391 in words is "two million, four hundred eighteen thousand, three hundred ninety-one".