1283641 has 4 divisors (see below), whose sum is σ = 1318372. Its totient is φ = 1248912.

The previous prime is 1283603. The next prime is 1283677. The reversal of 1283641 is 1463821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1008016 + 275625 = 1004^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 1283641 - 2⁹ = 1283129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1283441) 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 in 3 ways as a sum of consecutive naturals, for example, 17310 + ... + 17383.

It is an arithmetic number, because the mean of its divisors is an integer number (329593).

2^1283641 is an apocalyptic number.

It is an amenable number.

1283641 is a deficient number, since it is larger than the sum of its proper divisors (34731).

1283641 is an equidigital number, since it uses as much as digits as its factorization.

1283641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34730.

The product of its digits is 1152, while the sum is 25.

The square root of 1283641 is about 1132.9788171012. The cubic root of 1283641 is about 108.6795571461.

It can be divided in two parts, 1283 and 641, that multiplied together give a triangular number (822403 = T₁₂₈₂).

The spelling of 1283641 in words is "one million, two hundred eighty-three thousand, six hundred forty-one".