1217342 has 16 divisors (see below), whose sum is σ = 2112480. Its totient is φ = 515328.

The previous prime is 1217329. The next prime is 1217351. The reversal of 1217342 is 2437121.

It is an Ulam number.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 758 + ... + 1734.

It is an arithmetic number, because the mean of its divisors is an integer number (132030).

2^1217342 is an apocalyptic number.

1217342 is a deficient number, since it is larger than the sum of its proper divisors (895138).

1217342 is an equidigital number, since it uses as much as digits as its factorization.

1217342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075.

The product of its digits is 336, while the sum is 20.

The square root of 1217342 is about 1103.3322255785. The cubic root of 1217342 is about 106.7753168093.

The spelling of 1217342 in words is "one million, two hundred seventeen thousand, three hundred forty-two".