71621141 has 2 divisors, whose sum is σ = 71621142. Its totient is φ = 71621140.

The previous prime is 71621131. The next prime is 71621161. The reversal of 71621141 is 14112617.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71334916 + 286225 = 8446^2 + 535^2 .

It is a cyclic number.

It is not a de Polignac number, because 71621141 - 2¹⁰ = 71620117 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71621111) 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 as a sum of consecutive naturals, namely, 35810570 + 35810571.

It is an arithmetic number, because the mean of its divisors is an integer number (35810571).

Almost surely, 2^71621141 is an apocalyptic number.

It is an amenable number.

71621141 is a deficient number, since it is larger than the sum of its proper divisors (1).

71621141 is an equidigital number, since it uses as much as digits as its factorization.

71621141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 23.

The square root of 71621141 is about 8462.9274485842. The cubic root of 71621141 is about 415.2857972323.

Adding to 71621141 its reverse (14112617), we get a palindrome (85733758).

The spelling of 71621141 in words is "seventy-one million, six hundred twenty-one thousand, one hundred forty-one".