8742556 has 24 divisors (see below), whose sum is σ = 16405200. Its totient is φ = 4061952.

The previous prime is 8742551. The next prime is 8742571. The reversal of 8742556 is 6552478.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8742551) 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 7 ways as a sum of consecutive naturals, for example, 4870 + ... + 6418.

It is an arithmetic number, because the mean of its divisors is an integer number (683550).

Almost surely, 2^8742556 is an apocalyptic number.

It is an amenable number.

8742556 is a deficient number, since it is larger than the sum of its proper divisors (7662644).

8742556 is a wasteful number, since it uses less digits than its factorization.

8742556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653 (or 1651 counting only the distinct ones).

The product of its digits is 67200, while the sum is 37.

The square root of 8742556 is about 2956.7813581663. The cubic root of 8742556 is about 206.0058125108.

The spelling of 8742556 in words is "eight million, seven hundred forty-two thousand, five hundred fifty-six".