42505142 has 4 divisors (see below), whose sum is σ = 63757716. Its totient is φ = 21252570.

The previous prime is 42505121. The next prime is 42505157. The reversal of 42505142 is 24150524.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10626284 + ... + 10626287.

It is an arithmetic number, because the mean of its divisors is an integer number (15939429).

Almost surely, 2^42505142 is an apocalyptic number.

42505142 is a deficient number, since it is larger than the sum of its proper divisors (21252574).

42505142 is a wasteful number, since it uses less digits than its factorization.

42505142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21252573.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 42505142 is about 6519.5967666720. The cubic root of 42505142 is about 348.9906757990.

Adding to 42505142 its reverse (24150524), we get a palindrome (66655666).

The spelling of 42505142 in words is "forty-two million, five hundred five thousand, one hundred forty-two".