71210042 has 8 divisors (see below), whose sum is σ = 113098356. Its totient is φ = 33510592.

The previous prime is 71210039. The next prime is 71210063. The reversal of 71210042 is 24001217.

It can be written as a sum of positive squares in 2 ways, for example, as 58967041 + 12243001 = 7679^2 + 3499^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 71210042.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1047173 + ... + 1047240.

Almost surely, 2^71210042 is an apocalyptic number.

71210042 is a deficient number, since it is larger than the sum of its proper divisors (41888314).

71210042 is a wasteful number, since it uses less digits than its factorization.

71210042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094432.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 71210042 is about 8438.6042684795. The cubic root of 71210042 is about 414.4897042293.

Adding to 71210042 its reverse (24001217), we get a palindrome (95211259).

The spelling of 71210042 in words is "seventy-one million, two hundred ten thousand, forty-two".