1801087 has 4 divisors (see below), whose sum is σ = 1839456. Its totient is φ = 1762720.

The previous prime is 1801073. The next prime is 1801091. The reversal of 1801087 is 7801081.

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

It is a cyclic number.

It is not a de Polignac number, because 1801087 - 2⁷ = 1800959 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1801187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19114 + ... + 19207.

It is an arithmetic number, because the mean of its divisors is an integer number (459864).

2^1801087 is an apocalyptic number.

1801087 is a deficient number, since it is larger than the sum of its proper divisors (38369).

1801087 is an equidigital number, since it uses as much as digits as its factorization.

1801087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38368.

The product of its (nonzero) digits is 448, while the sum is 25.

The square root of 1801087 is about 1342.0458263413. The cubic root of 1801087 is about 121.6685214788.

The spelling of 1801087 in words is "one million, eight hundred one thousand, eighty-seven".