1853381 has 2 divisors, whose sum is σ = 1853382. Its totient is φ = 1853380.

The previous prime is 1853377. The next prime is 1853387. The reversal of 1853381 is 1833581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1522756 + 330625 = 1234^2 + 575^2 .

It is an emirp because it is prime and its reverse (1833581) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1853381 - 2² = 1853377 is a prime.

It is a super-2 number, since 2×1853381² = 6870042262322, which contains 22 as substring.

It is a Chen prime.

It is equal to p₁₃₈₇₇₃ and since 1853381 and 138773 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1853387) 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 as a sum of consecutive naturals, namely, 926690 + 926691.

It is an arithmetic number, because the mean of its divisors is an integer number (926691).

2^1853381 is an apocalyptic number.

It is an amenable number.

1853381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1853381 is an equidigital number, since it uses as much as digits as its factorization.

1853381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 29.

The square root of 1853381 is about 1361.3893638486. The cubic root of 1853381 is about 122.8348412351.

The spelling of 1853381 in words is "one million, eight hundred fifty-three thousand, three hundred eighty-one".