42042321240 has 96 divisors (see below), whose sum is σ = 133982732880. Its totient is φ = 10551789568.

The previous prime is 42042321239. The next prime is 42042321247. The reversal of 42042321240 is 4212324024.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 42042321240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42042321247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 571467 + ... + 640826.

Almost surely, 2^42042321240 is an apocalyptic number.

42042321240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42042321240 is an abundant number, since it is smaller than the sum of its proper divisors (91940411640).

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

42042321240 is a wasteful number, since it uses less digits than its factorization.

42042321240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1212341 (or 1212320 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

Adding to 42042321240 its reverse (4212324024), we get a palindrome (46254645264).

The spelling of 42042321240 in words is "forty-two billion, forty-two million, three hundred twenty-one thousand, two hundred forty".