42102434 has 12 divisors (see below), whose sum is σ = 69417222. Its totient is φ = 19137360.

The previous prime is 42102427. The next prime is 42102439. The reversal of 42102434 is 43420124.

It can be written as a sum of positive squares in only one way, i.e., 33605209 + 8497225 = 5797^2 + 2915^2 .

It is a super-2 number, since 2×42102434² = 3545229897448712, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42102439) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 86747 + ... + 87230.

Almost surely, 2^42102434 is an apocalyptic number.

42102434 is a deficient number, since it is larger than the sum of its proper divisors (27314788).

42102434 is a wasteful number, since it uses less digits than its factorization.

42102434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174001 (or 173990 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 42102434 is about 6488.6388403116. The cubic root of 42102434 is about 347.8850249940.

Adding to 42102434 its reverse (43420124), we get a palindrome (85522558).

The spelling of 42102434 in words is "forty-two million, one hundred two thousand, four hundred thirty-four".