71037121 has 4 divisors (see below), whose sum is σ = 72241200. Its totient is φ = 69833044.

The previous prime is 71037097. The next prime is 71037139. The reversal of 71037121 is 12173017.

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: 12173017 = 1031 ⋅11807.

It is a cyclic number.

It is not a de Polignac number, because 71037121 - 2⁷ = 71036993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71037092 and 71037101.

It is not an unprimeable number, because it can be changed into a prime (71037221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601951 + ... + 602068.

It is an arithmetic number, because the mean of its divisors is an integer number (18060300).

Almost surely, 2^71037121 is an apocalyptic number.

It is an amenable number.

71037121 is a deficient number, since it is larger than the sum of its proper divisors (1204079).

71037121 is a wasteful number, since it uses less digits than its factorization.

71037121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204078.

The product of its (nonzero) digits is 294, while the sum is 22.

The square root of 71037121 is about 8428.3522114349. The cubic root of 71037121 is about 414.1539272968.

The spelling of 71037121 in words is "seventy-one million, thirty-seven thousand, one hundred twenty-one".