42020055 has 96 divisors (see below), whose sum is σ = 92671488. Its totient is φ = 17107200.

The previous prime is 42020029. The next prime is 42020059. The reversal of 42020055 is 55002024.

It is not a de Polignac number, because 42020055 - 2⁵ = 42020023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42020059) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 232065 + ... + 232245.

It is an arithmetic number, because the mean of its divisors is an integer number (965328).

Almost surely, 2^42020055 is an apocalyptic number.

42020055 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42020055 is an abundant number, since it is smaller than the sum of its proper divisors (50651433).

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

42020055 is a wasteful number, since it uses less digits than its factorization.

42020055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 42020055 is about 6482.2877905875. The cubic root of 42020055 is about 347.6579824422.

Adding to 42020055 its reverse (55002024), we get a palindrome (97022079).

The spelling of 42020055 in words is "forty-two million, twenty thousand, fifty-five".