42000321040 has 80 divisors (see below), whose sum is σ = 103432187952. Its totient is φ = 15806185472.

The previous prime is 42000321029. The next prime is 42000321043. The reversal of 42000321040 is 4012300024.

It can be written as a sum of positive squares in 8 ways, for example, as 10505430016 + 31494891024 = 102496^2 + 177468^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (42000321043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7119372 + ... + 7125268.

Almost surely, 2^42000321040 is an apocalyptic number.

42000321040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42000321040 is an abundant number, since it is smaller than the sum of its proper divisors (61431866912).

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

42000321040 is a wasteful number, since it uses less digits than its factorization.

42000321040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11164 (or 11158 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 42000321040 its reverse (4012300024), we get a palindrome (46012621064).

The spelling of 42000321040 in words is "forty-two billion, three hundred twenty-one thousand, forty".