1851253 has 2 divisors, whose sum is σ = 1851254. Its totient is φ = 1851252.

The previous prime is 1851217. The next prime is 1851259. The reversal of 1851253 is 3521581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1790244 + 61009 = 1338^2 + 247^2 .

It is a cyclic number.

It is not a de Polignac number, because 1851253 - 2¹⁷ = 1720181 is a prime.

It is equal to p₁₃₈₆₁₆ and since 1851253 and 138616 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 (1851259) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925626 + 925627.

It is an arithmetic number, because the mean of its divisors is an integer number (925627).

2^1851253 is an apocalyptic number.

It is an amenable number.

1851253 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851253 is an equidigital number, since it uses as much as digits as its factorization.

1851253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 25.

The square root of 1851253 is about 1360.6075848679. The cubic root of 1851253 is about 122.7878113930.

The spelling of 1851253 in words is "one million, eight hundred fifty-one thousand, two hundred fifty-three".