42402142 has 8 divisors (see below), whose sum is σ = 63687816. Its totient is φ = 21172872.

The previous prime is 42402121. The next prime is 42402149. The reversal of 42402142 is 24120424.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42402149) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 12168 + ... + 15259.

It is an arithmetic number, because the mean of its divisors is an integer number (7960977).

Almost surely, 2^42402142 is an apocalyptic number.

42402142 is a deficient number, since it is larger than the sum of its proper divisors (21285674).

42402142 is a wasteful number, since it uses less digits than its factorization.

42402142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28202.

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

The square root of 42402142 is about 6511.6927138802. The cubic root of 42402142 is about 348.7085521757.

Adding to 42402142 its reverse (24120424), we get a palindrome (66522566).

The spelling of 42402142 in words is "forty-two million, four hundred two thousand, one hundred forty-two".