71541121 has 4 divisors (see below), whose sum is σ = 73204912. Its totient is φ = 69877332.

The previous prime is 71541079. The next prime is 71541139. The reversal of 71541121 is 12114517.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12114517 = 71 ⋅170627.

It is a cyclic number.

It is not a de Polignac number, because 71541121 - 2⁷ = 71540993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71541092 and 71541101.

It is not an unprimeable number, because it can be changed into a prime (71541181) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 831831 + ... + 831916.

It is an arithmetic number, because the mean of its divisors is an integer number (18301228).

Almost surely, 2^71541121 is an apocalyptic number.

It is an amenable number.

71541121 is a deficient number, since it is larger than the sum of its proper divisors (1663791).

71541121 is a wasteful number, since it uses less digits than its factorization.

71541121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1663790.

The product of its digits is 280, while the sum is 22.

The square root of 71541121 is about 8458.1984488424. The cubic root of 71541121 is about 415.1310777702.

Adding to 71541121 its reverse (12114517), we get a palindrome (83655638).

The spelling of 71541121 in words is "seventy-one million, five hundred forty-one thousand, one hundred twenty-one".