42081512 has 16 divisors (see below), whose sum is σ = 86076000. Its totient is φ = 19127920.

The previous prime is 42081509. The next prime is 42081517. The reversal of 42081512 is 21518024.

It is a super-2 number, since 2×42081512² = 3541707304412288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42081517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 239012 + ... + 239187.

It is an arithmetic number, because the mean of its divisors is an integer number (5379750).

Almost surely, 2^42081512 is an apocalyptic number.

It is an amenable number.

42081512 is an abundant number, since it is smaller than the sum of its proper divisors (43994488).

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

42081512 is a wasteful number, since it uses less digits than its factorization.

42081512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478216 (or 478212 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 23.

The square root of 42081512 is about 6487.0264374365. The cubic root of 42081512 is about 347.8273905078.

Adding to 42081512 its reverse (21518024), we get a palindrome (63599536).

The spelling of 42081512 in words is "forty-two million, eighty-one thousand, five hundred twelve".