1283642 has 4 divisors (see below), whose sum is σ = 1925466. Its totient is φ = 641820.

The previous prime is 1283603. The next prime is 1283677. The reversal of 1283642 is 2463821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2463821 = 821 ⋅3001.

It can be written as a sum of positive squares in only one way, i.e., 885481 + 398161 = 941^2 + 631^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 320909 + ... + 320912.

2^1283642 is an apocalyptic number.

1283642 is a deficient number, since it is larger than the sum of its proper divisors (641824).

1283642 is an equidigital number, since it uses as much as digits as its factorization.

1283642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641823.

The product of its digits is 2304, while the sum is 26.

The square root of 1283642 is about 1132.9792584156. The cubic root of 1283642 is about 108.6795853678.

It can be divided in two parts, 1283 and 642, that multiplied together give a triangular number (823686 = T₁₂₈₃).

The spelling of 1283642 in words is "one million, two hundred eighty-three thousand, six hundred forty-two".