42002144 has 12 divisors (see below), whose sum is σ = 82691784. Its totient is φ = 21001056.

The previous prime is 42002143. The next prime is 42002153. The reversal of 42002144 is 44120024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42002143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656252 + ... + 656315.

It is an arithmetic number, because the mean of its divisors is an integer number (6890982).

Almost surely, 2^42002144 is an apocalyptic number.

It is an amenable number.

42002144 is a deficient number, since it is larger than the sum of its proper divisors (40689640).

42002144 is a wasteful number, since it uses less digits than its factorization.

42002144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1312577 (or 1312569 counting only the distinct ones).

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

The square root of 42002144 is about 6480.9061094881. The cubic root of 42002144 is about 347.6085791508.

Adding to 42002144 its reverse (44120024), we get a palindrome (86122168).

The spelling of 42002144 in words is "forty-two million, two thousand, one hundred forty-four".