1802381 has 8 divisors (see below), whose sum is σ = 2115840. Its totient is φ = 1502928.

The previous prime is 1802363. The next prime is 1802393. The reversal of 1802381 is 1832081.

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

It is not a de Polignac number, because 1802381 - 2¹⁰ = 1801357 is a prime.

It is a super-2 number, since 2×1802381² = 6497154538322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1802081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3221 + ... + 3738.

It is an arithmetic number, because the mean of its divisors is an integer number (264480).

2^1802381 is an apocalyptic number.

It is an amenable number.

1802381 is a deficient number, since it is larger than the sum of its proper divisors (313459).

1802381 is an equidigital number, since it uses as much as digits as its factorization.

1802381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7003.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1802381 is about 1342.5278395624. The cubic root of 1802381 is about 121.6976522903.

The spelling of 1802381 in words is "one million, eight hundred two thousand, three hundred eighty-one".