71421441 has 32 divisors (see below), whose sum is σ = 117669888. Its totient is φ = 37523520.

The previous prime is 71421439. The next prime is 71421479. The reversal of 71421441 is 14412417.

It is not a de Polignac number, because 71421441 - 2¹ = 71421439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71421481) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 117360 + ... + 117966.

It is an arithmetic number, because the mean of its divisors is an integer number (3677184).

Almost surely, 2^71421441 is an apocalyptic number.

It is an amenable number.

71421441 is a deficient number, since it is larger than the sum of its proper divisors (46248447).

71421441 is a wasteful number, since it uses less digits than its factorization.

71421441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1061.

The product of its digits is 896, while the sum is 24.

The square root of 71421441 is about 8451.1206949138. The cubic root of 71421441 is about 414.8994598464.

Adding to 71421441 its reverse (14412417), we get a palindrome (85833858).

It can be divided in two parts, 714 and 21441, that added together give a triangular number (22155 = T₂₁₀).

The spelling of 71421441 in words is "seventy-one million, four hundred twenty-one thousand, four hundred forty-one".