42725886 has 48 divisors (see below), whose sum is σ = 99517824. Its totient is φ = 11978928.

The previous prime is 42725863. The next prime is 42725911. The reversal of 42725886 is 68852724.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 262041 + ... + 262203.

It is an arithmetic number, because the mean of its divisors is an integer number (2073288).

Almost surely, 2^42725886 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42725886, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49758912).

42725886 is an abundant number, since it is smaller than the sum of its proper divisors (56791938).

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

42725886 is a wasteful number, since it uses less digits than its factorization.

42725886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333 (or 254 counting only the distinct ones).

The product of its digits is 215040, while the sum is 42.

The square root of 42725886 is about 6536.5041115263. The cubic root of 42725886 is about 349.5937763224.

The spelling of 42725886 in words is "forty-two million, seven hundred twenty-five thousand, eight hundred eighty-six".