1242447 has 8 divisors (see below), whose sum is σ = 1713840. Its totient is φ = 799680.

The previous prime is 1242421. The next prime is 1242457. The reversal of 1242447 is 7442421.

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

It is not a de Polignac number, because 1242447 - 2⁸ = 1242191 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1242407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7054 + ... + 7227.

It is an arithmetic number, because the mean of its divisors is an integer number (214230).

2^1242447 is an apocalyptic number.

1242447 is a deficient number, since it is larger than the sum of its proper divisors (471393).

1242447 is a wasteful number, since it uses less digits than its factorization.

1242447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14313.

The product of its digits is 1792, while the sum is 24.

The square root of 1242447 is about 1114.6510664778. The cubic root of 1242447 is about 107.5043300942.

Adding to 1242447 its reverse (7442421), we get a palindrome (8684868).

It can be divided in two parts, 124244 and 7, that added together give a triangular number (124251 = T₄₉₈).

The spelling of 1242447 in words is "one million, two hundred forty-two thousand, four hundred forty-seven".