71817442 has 8 divisors (see below), whose sum is σ = 108837036. Its totient is φ = 35538432.

The previous prime is 71817419. The next prime is 71817443. The reversal of 71817442 is 24471817.

71817442 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 64304361 + 7513081 = 8019^2 + 2741^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 71817398 and 71817407.

It is not an unprimeable number, because it can be changed into a prime (71817443) 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 3 ways as a sum of consecutive naturals, for example, 184903 + ... + 185290.

Almost surely, 2^71817442 is an apocalyptic number.

71817442 is a deficient number, since it is larger than the sum of its proper divisors (37019594).

71817442 is a wasteful number, since it uses less digits than its factorization.

71817442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370292.

The product of its digits is 12544, while the sum is 34.

The square root of 71817442 is about 8474.5172133874. The cubic root of 71817442 is about 415.6648596668.

The spelling of 71817442 in words is "seventy-one million, eight hundred seventeen thousand, four hundred forty-two".