42142140 has 48 divisors (see below), whose sum is σ = 131110560. Its totient is φ = 11237760.

The previous prime is 42142091. The next prime is 42142151. The reversal of 42142140 is 4124124.

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

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 in 15 ways as a sum of consecutive naturals, for example, 38481 + ... + 39560.

It is an arithmetic number, because the mean of its divisors is an integer number (2731470).

Almost surely, 2^42142140 is an apocalyptic number.

It is an amenable number.

42142140 is an abundant number, since it is smaller than the sum of its proper divisors (88968420).

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

42142140 is a wasteful number, since it uses less digits than its factorization.

42142140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78059 (or 78051 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 42142140 is about 6491.6977748506. The cubic root of 42142140 is about 347.9943518703.

Adding to 42142140 its reverse (4124124), we get a palindrome (46266264).

The spelling of 42142140 in words is "forty-two million, one hundred forty-two thousand, one hundred forty".