1291342 has 8 divisors (see below), whose sum is σ = 2086056. Its totient is φ = 595992.

The previous prime is 1291327. The next prime is 1291343. The reversal of 1291342 is 2431921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 1 + 2¹⁹ + 9² + 1 + 3¹¹ + 4⁸ + 2¹⁹ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1291343) 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, 24808 + ... + 24859.

It is an arithmetic number, because the mean of its divisors is an integer number (260757).

2^1291342 is an apocalyptic number.

1291342 is a deficient number, since it is larger than the sum of its proper divisors (794714).

1291342 is a wasteful number, since it uses less digits than its factorization.

1291342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49682.

The product of its digits is 432, while the sum is 22.

The square root of 1291342 is about 1136.3722981488. The cubic root of 1291342 is about 108.8964592050.

The spelling of 1291342 in words is "one million, two hundred ninety-one thousand, three hundred forty-two".