76241721 has 4 divisors (see below), whose sum is σ = 101655632. Its totient is φ = 50827812.

The previous prime is 76241707. The next prime is 76241731. The reversal of 76241721 is 12714267.

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 76241721 - 2⁵ = 76241689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76241701) 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, 12706951 + ... + 12706956.

It is an arithmetic number, because the mean of its divisors is an integer number (25413908).

Almost surely, 2^76241721 is an apocalyptic number.

It is an amenable number.

76241721 is a deficient number, since it is larger than the sum of its proper divisors (25413911).

76241721 is a wasteful number, since it uses less digits than its factorization.

76241721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25413910.

The product of its digits is 4704, while the sum is 30.

The square root of 76241721 is about 8731.6505312570. The cubic root of 76241721 is about 424.0309566368.

Adding to 76241721 its reverse (12714267), we get a palindrome (88955988).

The spelling of 76241721 in words is "seventy-six million, two hundred forty-one thousand, seven hundred twenty-one".