1855313 has 2 divisors, whose sum is σ = 1855314. Its totient is φ = 1855312.

The previous prime is 1855307. The next prime is 1855327. The reversal of 1855313 is 3135581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1555009 + 300304 = 1247^2 + 548^2 .

It is a cyclic number.

It is not a de Polignac number, because 1855313 - 2¹² = 1851217 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1855303) 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, 927656 + 927657.

It is an arithmetic number, because the mean of its divisors is an integer number (927657).

2^1855313 is an apocalyptic number.

It is an amenable number.

1855313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1855313 is an equidigital number, since it uses as much as digits as its factorization.

1855313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 1855313 is about 1362.0987482558. The cubic root of 1855313 is about 122.8775082132.

The spelling of 1855313 in words is "one million, eight hundred fifty-five thousand, three hundred thirteen".