1918741 has 4 divisors (see below), whose sum is σ = 2093184. Its totient is φ = 1744300.

The previous prime is 1918733. The next prime is 1918747. The reversal of 1918741 is 1478191.

It is the 566-th star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1918741 - 2³ = 1918733 is a prime.

It is a Duffinian number.

1918741 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918747) 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, 87205 + ... + 87226.

It is an arithmetic number, because the mean of its divisors is an integer number (523296).

2^1918741 is an apocalyptic number.

1918741 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1918741 is a deficient number, since it is larger than the sum of its proper divisors (174443).

1918741 is a wasteful number, since it uses less digits than its factorization.

1918741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174442.

The product of its digits is 2016, while the sum is 31.

The square root of 1918741 is about 1385.1862690628. The cubic root of 1918741 is about 124.2621275916.

The spelling of 1918741 in words is "one million, nine hundred eighteen thousand, seven hundred forty-one".