1242556 has 24 divisors (see below), whose sum is σ = 2508800. Its totient is φ = 527472.

The previous prime is 1242517. The next prime is 1242569. The reversal of 1242556 is 6552421.

1242556 is nontrivially palindromic in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 1242556.

It is a congruent number.

It is an unprimeable number.

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, 5461 + ... + 5683.

2^1242556 is an apocalyptic number.

It is an amenable number.

1242556 is an abundant number, since it is smaller than the sum of its proper divisors (1266244).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1242556 is a wasteful number, since it uses less digits than its factorization.

1242556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 431 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 1242556 is about 1114.6999596304. The cubic root of 1242556 is about 107.5074737908.

Adding to 1242556 its reverse (6552421), we get a palindrome (7794977).

The spelling of 1242556 in words is "one million, two hundred forty-two thousand, five hundred fifty-six".