42155256 has 128 divisors (see below), whose sum is σ = 126282240. Its totient is φ = 11558400.

The previous prime is 42155249. The next prime is 42155273. The reversal of 42155256 is 65255124.

42155256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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 31 ways as a sum of consecutive naturals, for example, 243586 + ... + 243758.

It is an arithmetic number, because the mean of its divisors is an integer number (986580).

Almost surely, 2^42155256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42155256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63141120).

42155256 is an abundant number, since it is smaller than the sum of its proper divisors (84126984).

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

42155256 is a wasteful number, since it uses less digits than its factorization.

42155256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 273 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 42155256 is about 6492.7079096476. The cubic root of 42155256 is about 348.0304504997.

The spelling of 42155256 in words is "forty-two million, one hundred fifty-five thousand, two hundred fifty-six".