42581958 has 8 divisors (see below), whose sum is σ = 85163928. Its totient is φ = 14193984.

The previous prime is 42581939. The next prime is 42581963. The reversal of 42581958 is 85918524.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

42581958 is an admirable number.

It is a super-2 number, since 2×42581958² = 3626446294227528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3548491 + ... + 3548502.

It is an arithmetic number, because the mean of its divisors is an integer number (10645491).

Almost surely, 2^42581958 is an apocalyptic number.

42581958 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

42581958 is a wasteful number, since it uses less digits than its factorization.

42581958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7096998.

The product of its digits is 115200, while the sum is 42.

The square root of 42581958 is about 6525.4852693114. The cubic root of 42581958 is about 349.2007831990.

It can be divided in two parts, 4258 and 1958, that added together give a triangular number (6216 = T₁₁₁).

The spelling of 42581958 in words is "forty-two million, five hundred eighty-one thousand, nine hundred fifty-eight".