1312642 has 4 divisors (see below), whose sum is σ = 1968966. Its totient is φ = 656320.

The previous prime is 1312637. The next prime is 1312657. The reversal of 1312642 is 2462131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2462131 = 7 ⋅351733.

It can be written as a sum of positive squares in only one way, i.e., 1022121 + 290521 = 1011^2 + 539^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328159 + ... + 328162.

2^1312642 is an apocalyptic number.

1312642 is a deficient number, since it is larger than the sum of its proper divisors (656324).

1312642 is an equidigital number, since it uses as much as digits as its factorization.

1312642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656323.

The product of its digits is 288, while the sum is 19.

The square root of 1312642 is about 1145.7058959436. The cubic root of 1312642 is about 109.4919268737.

Adding to 1312642 its reverse (2462131), we get a palindrome (3774773).

The spelling of 1312642 in words is "one million, three hundred twelve thousand, six hundred forty-two".