1242544 has 10 divisors (see below), whose sum is σ = 2407460. Its totient is φ = 621264.

The previous prime is 1242517. The next prime is 1242569. The reversal of 1242544 is 4452421.

It is a happy 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 as a sum of consecutive naturals, namely, 38814 + ... + 38845.

It is an arithmetic number, because the mean of its divisors is an integer number (240746).

2^1242544 is an apocalyptic number.

It is an amenable number.

1242544 is a deficient number, since it is larger than the sum of its proper divisors (1164916).

1242544 is an equidigital number, since it uses as much as digits as its factorization.

1242544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77667 (or 77661 counting only the distinct ones).

The product of its digits is 1280, while the sum is 22.

The square root of 1242544 is about 1114.6945770030. The cubic root of 1242544 is about 107.5071277048.

Adding to 1242544 its reverse (4452421), we get a palindrome (5694965).

The spelling of 1242544 in words is "one million, two hundred forty-two thousand, five hundred forty-four".