8140242 has 32 divisors (see below), whose sum is σ = 18377280. Its totient is φ = 2381120.

The previous prime is 8140211. The next prime is 8140247. The reversal of 8140242 is 2420418.

It is not an unprimeable number, because it can be changed into a prime (8140247) 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 15 ways as a sum of consecutive naturals, for example, 213 + ... + 4040.

It is an arithmetic number, because the mean of its divisors is an integer number (574290).

Almost surely, 2^8140242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8140242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9188640).

8140242 is an abundant number, since it is smaller than the sum of its proper divisors (10237038).

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

8140242 is a wasteful number, since it uses less digits than its factorization.

8140242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4298.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 8140242 is about 2853.1109337003. The cubic root of 8140242 is about 201.1619199711.

The spelling of 8140242 in words is "eight million, one hundred forty thousand, two hundred forty-two".