1242646 has 8 divisors (see below), whose sum is σ = 1874304. Its totient is φ = 617880.

The previous prime is 1242643. The next prime is 1242739. The reversal of 1242646 is 6462421.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1242646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242641) 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, 1245 + ... + 2008.

It is an arithmetic number, because the mean of its divisors is an integer number (234288).

2^1242646 is an apocalyptic number.

1242646 is a deficient number, since it is larger than the sum of its proper divisors (631658).

1242646 is a wasteful number, since it uses less digits than its factorization.

1242646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3446.

The product of its digits is 2304, while the sum is 25.

The square root of 1242646 is about 1114.7403285070. The cubic root of 1242646 is about 107.5100693651.

The spelling of 1242646 in words is "one million, two hundred forty-two thousand, six hundred forty-six".