42105512 has 8 divisors (see below), whose sum is σ = 78947850. Its totient is φ = 21052752.

The previous prime is 42105493. The next prime is 42105523. The reversal of 42105512 is 21550124.

It can be written as a sum of positive squares in only one way, i.e., 31516996 + 10588516 = 5614^2 + 3254^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2631587 + ... + 2631602.

Almost surely, 2^42105512 is an apocalyptic number.

It is an amenable number.

42105512 is a deficient number, since it is larger than the sum of its proper divisors (36842338).

42105512 is a wasteful number, since it uses less digits than its factorization.

42105512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263195 (or 5263191 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 42105512 is about 6488.8760197741. The cubic root of 42105512 is about 347.8935024454.

Adding to 42105512 its reverse (21550124), we get a palindrome (63655636).

The spelling of 42105512 in words is "forty-two million, one hundred five thousand, five hundred twelve".