71442321 has 8 divisors (see below), whose sum is σ = 98329344. Its totient is φ = 46091760.

The previous prime is 71442317. The next prime is 71442331. The reversal of 71442321 is 12324417.

It is a happy number.

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

It is not a de Polignac number, because 71442321 - 2² = 71442317 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71442291 and 71442300.

It is not an unprimeable number, because it can be changed into a prime (71442331) 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 7 ways as a sum of consecutive naturals, for example, 384006 + ... + 384191.

It is an arithmetic number, because the mean of its divisors is an integer number (12291168).

Almost surely, 2^71442321 is an apocalyptic number.

It is an amenable number.

71442321 is a deficient number, since it is larger than the sum of its proper divisors (26887023).

71442321 is a wasteful number, since it uses less digits than its factorization.

71442321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768231.

The product of its digits is 1344, while the sum is 24.

The square root of 71442321 is about 8452.3559437591. The cubic root of 71442321 is about 414.9398877465.

Adding to 71442321 its reverse (12324417), we get a palindrome (83766738).

The spelling of 71442321 in words is "seventy-one million, four hundred forty-two thousand, three hundred twenty-one".