71161541 has 16 divisors (see below), whose sum is σ = 83255040. Its totient is φ = 60103680.

The previous prime is 71161487. The next prime is 71161543. The reversal of 71161541 is 14516117.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71161541 - 2⁶ = 71161477 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71161541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71161543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12365 + ... + 17181.

It is an arithmetic number, because the mean of its divisors is an integer number (5203440).

Almost surely, 2^71161541 is an apocalyptic number.

It is an amenable number.

71161541 is a deficient number, since it is larger than the sum of its proper divisors (12093499).

71161541 is a wasteful number, since it uses less digits than its factorization.

71161541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4924.

The product of its digits is 840, while the sum is 26.

The square root of 71161541 is about 8435.7300217586. The cubic root of 71161541 is about 414.3955801873.

Adding to 71161541 its reverse (14516117), we get a palindrome (85677658).

The spelling of 71161541 in words is "seventy-one million, one hundred sixty-one thousand, five hundred forty-one".