42402420424040 has 16 divisors (see below), whose sum is σ = 95405445954180. Its totient is φ = 16960968169600.

The previous prime is 42402420423967. The next prime is 42402420424061. The reversal of 42402420424040 is 4042402420424.

It can be written as a sum of positive squares in 2 ways, for example, as 40582225494724 + 1820194929316 = 6370418^2 + 1349146^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42402420423988 and 42402420424006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530030255261 + ... + 530030255340.

Almost surely, 2^{42402420424040} is an apocalyptic number.

42402420424040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42402420424040 is an abundant number, since it is smaller than the sum of its proper divisors (53003025530140).

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

42402420424040 is a wasteful number, since it uses less digits than its factorization.

42402420424040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060060510612 (or 1060060510608 counting only the distinct ones).

The product of its (nonzero) digits is 65536, while the sum is 32.

Adding to 42402420424040 its reverse (4042402420424), we get a palindrome (46444822844464).

The spelling of 42402420424040 in words is "forty-two trillion, four hundred two billion, four hundred twenty million, four hundred twenty-four thousand, forty".