1801465 has 4 divisors (see below), whose sum is σ = 2161764. Its totient is φ = 1441168.

The previous prime is 1801453. The next prime is 1801469. The reversal of 1801465 is 5641081.

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

It can be written as a sum of positive squares in 2 ways, for example, as 295936 + 1505529 = 544^2 + 1227^2 .

It is a cyclic number.

It is not a de Polignac number, because 1801465 - 2⁵ = 1801433 is a prime.

It is a super-2 number, since 2×1801465² = 6490552292450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801469) 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, 180142 + ... + 180151.

It is an arithmetic number, because the mean of its divisors is an integer number (540441).

2^1801465 is an apocalyptic number.

It is an amenable number.

1801465 is a deficient number, since it is larger than the sum of its proper divisors (360299).

1801465 is an equidigital number, since it uses as much as digits as its factorization.

1801465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360298.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 1801465 is about 1342.1866487192. The cubic root of 1801465 is about 121.6770325398.

The spelling of 1801465 in words is "one million, eight hundred one thousand, four hundred sixty-five".