71221041 has 48 divisors (see below), whose sum is σ = 116947584. Its totient is φ = 41513472.

The previous prime is 71221021. The next prime is 71221049. The reversal of 71221041 is 14012217.

It is not a de Polignac number, because 71221041 - 2⁹ = 71220529 is a prime.

It is a super-2 number, since 2×71221041² = 10144873362247362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71221049) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 129930 + ... + 130476.

It is an arithmetic number, because the mean of its divisors is an integer number (2436408).

Almost surely, 2^71221041 is an apocalyptic number.

It is an amenable number.

71221041 is a deficient number, since it is larger than the sum of its proper divisors (45726543).

71221041 is a wasteful number, since it uses less digits than its factorization.

71221041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 630 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 71221041 is about 8439.2559506156. The cubic root of 71221041 is about 414.5110436239.

Adding to 71221041 its reverse (14012217), we get a palindrome (85233258).

The spelling of 71221041 in words is "seventy-one million, two hundred twenty-one thousand, forty-one".