42040144 has 10 divisors (see below), whose sum is σ = 81452810. Its totient is φ = 21020064.

The previous prime is 42040121. The next prime is 42040151. The reversal of 42040144 is 44104024.

It can be written as a sum of positive squares in only one way, i.e., 23892544 + 18147600 = 4888^2 + 4260^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1313739 + ... + 1313770.

It is an arithmetic number, because the mean of its divisors is an integer number (8145281).

Almost surely, 2^42040144 is an apocalyptic number.

It is an amenable number.

42040144 is a deficient number, since it is larger than the sum of its proper divisors (39412666).

42040144 is a wasteful number, since it uses less digits than its factorization.

42040144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2627517 (or 2627511 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 42040144 is about 6483.8371355240. The cubic root of 42040144 is about 347.7133765353.

Adding to 42040144 its reverse (44104024), we get a palindrome (86144168).

The spelling of 42040144 in words is "forty-two million, forty thousand, one hundred forty-four".