71330421 has 16 divisors (see below), whose sum is σ = 99164736. Its totient is φ = 45566976.

The previous prime is 71330407. The next prime is 71330423. The reversal of 71330421 is 12403317.

It is not a de Polignac number, because 71330421 - 2⁷ = 71330293 is a prime.

It is a super-3 number, since 3×71330421³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71330423) 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 15 ways as a sum of consecutive naturals, for example, 1621 + ... + 12053.

It is an arithmetic number, because the mean of its divisors is an integer number (6197796).

Almost surely, 2^71330421 is an apocalyptic number.

It is an amenable number.

71330421 is a deficient number, since it is larger than the sum of its proper divisors (27834315).

71330421 is a wasteful number, since it uses less digits than its factorization.

71330421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10532.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 71330421 is about 8445.7338935110. The cubic root of 71330421 is about 414.7231346329.

Adding to 71330421 its reverse (12403317), we get a palindrome (83733738).

The spelling of 71330421 in words is "seventy-one million, three hundred thirty thousand, four hundred twenty-one".