42171124 has 12 divisors (see below), whose sum is σ = 75599748. Its totient is φ = 20571200.

The previous prime is 42171113. The next prime is 42171131. The reversal of 42171124 is 42117124.

It can be written as a sum of positive squares in 2 ways, for example, as 21921124 + 20250000 = 4682^2 + 4500^2 .

It is a junction number, because it is equal to n+sod(n) for n = 42171095 and 42171104.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128407 + ... + 128734.

It is an arithmetic number, because the mean of its divisors is an integer number (6299979).

Almost surely, 2^42171124 is an apocalyptic number.

It is an amenable number.

42171124 is a deficient number, since it is larger than the sum of its proper divisors (33428624).

42171124 is a wasteful number, since it uses less digits than its factorization.

42171124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257186 (or 257184 counting only the distinct ones).

The product of its digits is 448, while the sum is 22.

The square root of 42171124 is about 6493.9297809570. The cubic root of 42171124 is about 348.0741133382.

Adding to 42171124 its reverse (42117124), we get a palindrome (84288248).

The spelling of 42171124 in words is "forty-two million, one hundred seventy-one thousand, one hundred twenty-four".