42256530 has 96 divisors (see below), whose sum is σ = 114903360. Its totient is φ = 10765440.

The previous prime is 42256523. The next prime is 42256531. The reversal of 42256530 is 3565224.

42256530 is a `hidden beast` number, since 4 + 2 + 2 + 5 + 653 + 0 = 666.

It is a super-2 number, since 2×42256530² = 3571228655281800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42256494 and 42256503.

It is not an unprimeable number, because it can be changed into a prime (42256531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 235981 + ... + 236159.

It is an arithmetic number, because the mean of its divisors is an integer number (1196910).

Almost surely, 2^42256530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42256530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57451680).

42256530 is an abundant number, since it is smaller than the sum of its proper divisors (72646830).

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

42256530 is a wasteful number, since it uses less digits than its factorization.

42256530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296 (or 293 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 42256530 is about 6500.5022882851. The cubic root of 42256530 is about 348.3089309818.

The spelling of 42256530 in words is "forty-two million, two hundred fifty-six thousand, five hundred thirty".