1918265 has 8 divisors (see below), whose sum is σ = 2364360. Its totient is φ = 1492992.

The previous prime is 1918247. The next prime is 1918283. The reversal of 1918265 is 5628191.

It is an interprime number because it is at equal distance from previous prime (1918247) and next prime (1918283).

It can be written as a sum of positive squares in 4 ways, for example, as 141376 + 1776889 = 376^2 + 1333^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1918265 - 2¹⁸ = 1656121 is a prime.

It is a super-2 number, since 2×1918265² = 7359481220450, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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, 5000 + ... + 5369.

It is an arithmetic number, because the mean of its divisors is an integer number (295545).

2^1918265 is an apocalyptic number.

It is an amenable number.

1918265 is a deficient number, since it is larger than the sum of its proper divisors (446095).

1918265 is a wasteful number, since it uses less digits than its factorization.

1918265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10411.

The product of its digits is 4320, while the sum is 32.

The square root of 1918265 is about 1385.0144403579. The cubic root of 1918265 is about 124.2518511195.

The spelling of 1918265 in words is "one million, nine hundred eighteen thousand, two hundred sixty-five".