1918742 has 16 divisors (see below), whose sum is σ = 3357600. Its totient is φ = 822024.

The previous prime is 1918733. The next prime is 1918747. The reversal of 1918742 is 2478191.

It is a super-3 number, since 3×1918742³ = 21191953919933323464, which contains 333 as substring.

It is an Ulam number.

It is a nialpdrome in base 7.

It is a zygodrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 1918699 and 1918708.

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 7 ways as a sum of consecutive naturals, for example, 713 + ... + 2084.

It is an arithmetic number, because the mean of its divisors is an integer number (209850).

2^1918742 is an apocalyptic number.

1918742 is a deficient number, since it is larger than the sum of its proper divisors (1438858).

1918742 is an equidigital number, since it uses as much as digits as its factorization.

1918742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2820 (or 2806 counting only the distinct ones).

The product of its digits is 4032, while the sum is 32.

The square root of 1918742 is about 1385.1866300250. The cubic root of 1918742 is about 124.2621491790.

The spelling of 1918742 in words is "one million, nine hundred eighteen thousand, seven hundred forty-two".