1281853 has 2 divisors, whose sum is σ = 1281854. Its totient is φ = 1281852.

The previous prime is 1281827. The next prime is 1281871. The reversal of 1281853 is 3581821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 925444 + 356409 = 962^2 + 597^2 .

It is an emirp because it is prime and its reverse (3581821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1281853 - 2⁵ = 1281821 is a prime.

It is a super-2 number, since 2×1281853² = 3286294227218, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640926 + 640927.

It is an arithmetic number, because the mean of its divisors is an integer number (640927).

2^1281853 is an apocalyptic number.

It is an amenable number.

1281853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281853 is an equidigital number, since it uses as much as digits as its factorization.

1281853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 28.

The square root of 1281853 is about 1132.1894717758. The cubic root of 1281853 is about 108.6290733164.

Subtracting 1281853 from its reverse (3581821), we obtain a cube (2299968 = 132³).

The spelling of 1281853 in words is "one million, two hundred eighty-one thousand, eight hundred fifty-three".