1851373 has 2 divisors, whose sum is σ = 1851374. Its totient is φ = 1851372.

The previous prime is 1851371. The next prime is 1851391. The reversal of 1851373 is 3731581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1633284 + 218089 = 1278^2 + 467^2 .

It is a cyclic number.

It is not a de Polignac number, because 1851373 - 2¹ = 1851371 is a prime.

Together with 1851371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1851371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925686 + 925687.

It is an arithmetic number, because the mean of its divisors is an integer number (925687).

2^1851373 is an apocalyptic number.

It is an amenable number.

1851373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851373 is an equidigital number, since it uses as much as digits as its factorization.

1851373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2520, while the sum is 28.

The square root of 1851373 is about 1360.6516820994. The cubic root of 1851373 is about 122.7904644104.

The spelling of 1851373 in words is "one million, eight hundred fifty-one thousand, three hundred seventy-three".