140005242 has 48 divisors (see below), whose sum is σ = 334669608. Its totient is φ = 42024960.

The previous prime is 140005231. The next prime is 140005247. The reversal of 140005242 is 242500041.

140005242 is a `hidden beast` number, since 140 + 0 + 0 + 524 + 2 = 666.

140005242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 27029601 + 112975641 = 5199^2 + 10629^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (140005247) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2298 + ... + 16890.

Almost surely, 2^140005242 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 140005242, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167334804).

140005242 is an abundant number, since it is smaller than the sum of its proper divisors (194664366).

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

140005242 is a wasteful number, since it uses less digits than its factorization.

140005242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14655 (or 14652 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 140005242 is about 11832.3810790559. The cubic root of 140005242 is about 519.2558908314.

Adding to 140005242 its reverse (242500041), we get a palindrome (382505283).

The spelling of 140005242 in words is "one hundred forty million, five thousand, two hundred forty-two".