1868243 has 4 divisors (see below), whose sum is σ = 2011968. Its totient is φ = 1724520.

The previous prime is 1868239. The next prime is 1868257. The reversal of 1868243 is 3428681.

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

It is a cyclic number.

It is not a de Polignac number, because 1868243 - 2² = 1868239 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (1868443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71843 + ... + 71868.

It is an arithmetic number, because the mean of its divisors is an integer number (502992).

2^1868243 is an apocalyptic number.

1868243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1868243 is a deficient number, since it is larger than the sum of its proper divisors (143725).

1868243 is a wasteful number, since it uses less digits than its factorization.

1868243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143724.

The product of its digits is 9216, while the sum is 32.

The square root of 1868243 is about 1366.8368593216. The cubic root of 1868243 is about 123.1622992460.

The spelling of 1868243 in words is "one million, eight hundred sixty-eight thousand, two hundred forty-three".