42145511 has 6 divisors (see below), whose sum is σ = 43063560. Its totient is φ = 41246636.

The previous prime is 42145507. The next prime is 42145513. The reversal of 42145511 is 11554124.

42145511 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42145511 - 2² = 42145507 is a prime.

It is a super-2 number, since 2×42145511² = 3552488194902242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42145513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7331 + ... + 11748.

It is an arithmetic number, because the mean of its divisors is an integer number (7177260).

Almost surely, 2^42145511 is an apocalyptic number.

42145511 is a deficient number, since it is larger than the sum of its proper divisors (918049).

42145511 is an equidigital number, since it uses as much as digits as its factorization.

42145511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19173 (or 19126 counting only the distinct ones).

The product of its digits is 800, while the sum is 23.

The square root of 42145511 is about 6491.9574089792. The cubic root of 42145511 is about 348.0036304505.

Adding to 42145511 its reverse (11554124), we get a palindrome (53699635).

The spelling of 42145511 in words is "forty-two million, one hundred forty-five thousand, five hundred eleven".