71342421 has 8 divisors (see below), whose sum is σ = 100718784. Its totient is φ = 44763840.

The previous prime is 71342413. The next prime is 71342423. The reversal of 71342421 is 12424317.

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 71342421 - 2³ = 71342413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71342391 and 71342400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71342423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 699385 + ... + 699486.

It is an arithmetic number, because the mean of its divisors is an integer number (12589848).

Almost surely, 2^71342421 is an apocalyptic number.

It is an amenable number.

71342421 is a deficient number, since it is larger than the sum of its proper divisors (29376363).

71342421 is a wasteful number, since it uses less digits than its factorization.

71342421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398891.

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

The square root of 71342421 is about 8446.4442814713. Note that the first 3 decimals coincide. The cubic root of 71342421 is about 414.7463897812.

Adding to 71342421 its reverse (12424317), we get a palindrome (83766738).

It can be divided in two parts, 713 and 42421, that added together give a palindrome (43134).

The spelling of 71342421 in words is "seventy-one million, three hundred forty-two thousand, four hundred twenty-one".