1618801 has 4 divisors (see below), whose sum is σ = 1626100. Its totient is φ = 1611504.

The previous prime is 1618777. The next prime is 1618807. The reversal of 1618801 is 1088161.

It is a happy number.

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 1100401 + 518400 = 1049^2 + 720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1618801 - 2⁵ = 1618769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1618807) 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, 3306 + ... + 3763.

It is an arithmetic number, because the mean of its divisors is an integer number (406525).

2^1618801 is an apocalyptic number.

It is an amenable number.

1618801 is a deficient number, since it is larger than the sum of its proper divisors (7299).

1618801 is an equidigital number, since it uses as much as digits as its factorization.

1618801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7298.

The product of its (nonzero) digits is 384, while the sum is 25.

The square root of 1618801 is about 1272.3211072681. The cubic root of 1618801 is about 117.4170472301.

The spelling of 1618801 in words is "one million, six hundred eighteen thousand, eight hundred one".