1802881 has 4 divisors (see below), whose sum is σ = 1827652. Its totient is φ = 1778112.

The previous prime is 1802839. The next prime is 1802897. The reversal of 1802881 is 1882081.

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 1418481 + 384400 = 1191^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 1802881 - 2⁷ = 1802753 is a prime.

It is a super-2 number, since 2×1802881² = 6500759800322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1802821) 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, 12276 + ... + 12421.

It is an arithmetic number, because the mean of its divisors is an integer number (456913).

2^1802881 is an apocalyptic number.

It is an amenable number.

1802881 is a deficient number, since it is larger than the sum of its proper divisors (24771).

1802881 is an equidigital number, since it uses as much as digits as its factorization.

1802881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24770.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 1802881 is about 1342.7140425273. The cubic root of 1802881 is about 121.7089046652.

The spelling of 1802881 in words is "one million, eight hundred two thousand, eight hundred eighty-one".