42451420240 has 40 divisors (see below), whose sum is σ = 98752429440. Its totient is φ = 16971470976.

The previous prime is 42451420237. The next prime is 42451420241. The reversal of 42451420240 is 4202415424.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 42451420199 and 42451420208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42451420241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9117 + ... + 291523.

It is an arithmetic number, because the mean of its divisors is an integer number (2468810736).

Almost surely, 2^42451420240 is an apocalyptic number.

42451420240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42451420240 is an abundant number, since it is smaller than the sum of its proper divisors (56301009200).

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

42451420240 is a wasteful number, since it uses less digits than its factorization.

42451420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284299 (or 284293 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 28.

Adding to 42451420240 its reverse (4202415424), we get a palindrome (46653835664).

The spelling of 42451420240 in words is "forty-two billion, four hundred fifty-one million, four hundred twenty thousand, two hundred forty".