8142724 has 6 divisors (see below), whose sum is σ = 14249774. Its totient is φ = 4071360.

The previous prime is 8142683. The next prime is 8142727. The reversal of 8142724 is 4272418.

It can be written as a sum of positive squares in only one way, i.e., 8020224 + 122500 = 2832^2 + 350^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8142692 and 8142701.

It is not an unprimeable number, because it can be changed into a prime (8142727) 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 as a sum of consecutive naturals, namely, 1017837 + ... + 1017844.

Almost surely, 2^8142724 is an apocalyptic number.

It is an amenable number.

8142724 is a deficient number, since it is larger than the sum of its proper divisors (6107050).

8142724 is a wasteful number, since it uses less digits than its factorization.

8142724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035685 (or 2035683 counting only the distinct ones).

The product of its digits is 3584, while the sum is 28.

The square root of 8142724 is about 2853.5458643589. The cubic root of 8142724 is about 201.1823629812.

The spelling of 8142724 in words is "eight million, one hundred forty-two thousand, seven hundred twenty-four".