1918065 has 16 divisors (see below), whose sum is σ = 3113856. Its totient is φ = 1008000.

The previous prime is 1918027. The next prime is 1918067. The reversal of 1918065 is 5608191.

It is a happy number.

It is not a de Polignac number, because 1918065 - 2¹² = 1913969 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165 + ... + 1965.

It is an arithmetic number, because the mean of its divisors is an integer number (194616).

2^1918065 is an apocalyptic number.

1918065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1918065 is a deficient number, since it is larger than the sum of its proper divisors (1195791).

1918065 is a wasteful number, since it uses less digits than its factorization.

1918065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 1918065 is about 1384.9422370626. The cubic root of 1918065 is about 124.2475327670.

It can be divided in two parts, 191 and 8065, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 1918065 in words is "one million, nine hundred eighteen thousand, sixty-five".