42870555 has 144 divisors (see below), whose sum is σ = 99852480. Its totient is φ = 16547328.

The previous prime is 42870547. The next prime is 42870571. The reversal of 42870555 is 55507824.

It is a happy number.

42870555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42870555 - 2³ = 42870547 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 1478281 + ... + 1478309.

It is an arithmetic number, because the mean of its divisors is an integer number (693420).

Almost surely, 2^42870555 is an apocalyptic number.

42870555 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42870555 is an abundant number, since it is smaller than the sum of its proper divisors (56981925).

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

42870555 is a wasteful number, since it uses less digits than its factorization.

42870555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 42870555 is about 6547.5609962795. The cubic root of 42870555 is about 349.9879043439.

The spelling of 42870555 in words is "forty-two million, eight hundred seventy thousand, five hundred fifty-five".