42255140 has 48 divisors (see below), whose sum is σ = 93647232. Its totient is φ = 15983616.

The previous prime is 42255131. The next prime is 42255181. The reversal of 42255140 is 4155224.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44147 + ... + 45093.

It is an arithmetic number, because the mean of its divisors is an integer number (1950984).

Almost surely, 2^42255140 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 42255140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46823616).

42255140 is an abundant number, since it is smaller than the sum of its proper divisors (51392092).

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

42255140 is a wasteful number, since it uses less digits than its factorization.

42255140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1076 (or 1074 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42255140 is about 6500.3953725908. The cubic root of 42255140 is about 348.3051118110.

The spelling of 42255140 in words is "forty-two million, two hundred fifty-five thousand, one hundred forty".