71197641 has 6 divisors (see below), whose sum is σ = 102841050. Its totient is φ = 47465088.

The previous prime is 71197619. The next prime is 71197661. The reversal of 71197641 is 14679117.

71197641 is a `hidden beast` number, since 7 + 1 + 1 + 9 + 7 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 49070025 + 22127616 = 7005^2 + 4704^2 .

It is not a de Polignac number, because 71197641 - 2¹³ = 71189449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71197596 and 71197605.

It is not an unprimeable number, because it can be changed into a prime (71197661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3955416 + ... + 3955433.

It is an arithmetic number, because the mean of its divisors is an integer number (17140175).

Almost surely, 2^71197641 is an apocalyptic number.

It is an amenable number.

71197641 is a deficient number, since it is larger than the sum of its proper divisors (31643409).

71197641 is a wasteful number, since it uses less digits than its factorization.

71197641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7910855 (or 7910852 counting only the distinct ones).

The product of its digits is 10584, while the sum is 36.

The square root of 71197641 is about 8437.8694585778. The cubic root of 71197641 is about 414.4656421491.

The spelling of 71197641 in words is "seventy-one million, one hundred ninety-seven thousand, six hundred forty-one".