71048721 has 4 divisors (see below), whose sum is σ = 94731632. Its totient is φ = 47365812.

The previous prime is 71048711. The next prime is 71048723. The reversal of 71048721 is 12784017.

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.

It is not a de Polignac number, because 71048721 - 2⁵ = 71048689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (71048723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11841451 + ... + 11841456.

It is an arithmetic number, because the mean of its divisors is an integer number (23682908).

Almost surely, 2^71048721 is an apocalyptic number.

It is an amenable number.

71048721 is a deficient number, since it is larger than the sum of its proper divisors (23682911).

71048721 is a wasteful number, since it uses less digits than its factorization.

71048721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23682910.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 71048721 is about 8429.0403368355. The cubic root of 71048721 is about 414.1764691454.

The spelling of 71048721 in words is "seventy-one million, forty-eight thousand, seven hundred twenty-one".