1285841 has 2 divisors, whose sum is σ = 1285842. Its totient is φ = 1285840.

The previous prime is 1285813. The next prime is 1285847. The reversal of 1285841 is 1485821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802816 + 483025 = 896^2 + 695^2 .

It is an emirp because it is prime and its reverse (1485821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1285841 - 2⁶ = 1285777 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1285847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 642920 + 642921.

It is an arithmetic number, because the mean of its divisors is an integer number (642921).

2^1285841 is an apocalyptic number.

It is an amenable number.

1285841 is a deficient number, since it is larger than the sum of its proper divisors (1).

1285841 is an equidigital number, since it uses as much as digits as its factorization.

1285841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2560, while the sum is 29.

The square root of 1285841 is about 1133.9492933990. The cubic root of 1285841 is about 108.7416094288.

The spelling of 1285841 in words is "one million, two hundred eighty-five thousand, eight hundred forty-one".