71144742 has 8 divisors (see below), whose sum is σ = 142289496. Its totient is φ = 23714912.

The previous prime is 71144729. The next prime is 71144761. The reversal of 71144742 is 24744117.

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

71144742 is an admirable number.

It is a congruent number.

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, 5928723 + ... + 5928734.

It is an arithmetic number, because the mean of its divisors is an integer number (17786187).

Almost surely, 2^71144742 is an apocalyptic number.

71144742 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71144742 is a wasteful number, since it uses less digits than its factorization.

71144742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11857462.

The product of its digits is 6272, while the sum is 30.

The square root of 71144742 is about 8434.7342578175. The cubic root of 71144742 is about 414.3629690366.

Adding to 71144742 its reverse (24744117), we get a palindrome (95888859).

The spelling of 71144742 in words is "seventy-one million, one hundred forty-four thousand, seven hundred forty-two".