2440142 has 4 divisors (see below), whose sum is σ = 3660216. Its totient is φ = 1220070.

The previous prime is 2440127. The next prime is 2440153. The reversal of 2440142 is 2410442.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2440142.

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 as a sum of consecutive naturals, namely, 610034 + ... + 610037.

It is an arithmetic number, because the mean of its divisors is an integer number (915054).

2^2440142 is an apocalyptic number.

2440142 is a deficient number, since it is larger than the sum of its proper divisors (1220074).

2440142 is a wasteful number, since it uses less digits than its factorization.

2440142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1220073.

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 2440142 is about 1562.0953876124. The cubic root of 2440142 is about 134.6289214979.

Adding to 2440142 its reverse (2410442), we get a palindrome (4850584).

The spelling of 2440142 in words is "two million, four hundred forty thousand, one hundred forty-two".