721116741 has 8 divisors (see below), whose sum is σ = 962527680. Its totient is φ = 480225152.

The previous prime is 721116731. The next prime is 721116743. The reversal of 721116741 is 147611127.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 721116741 - 2¹⁴ = 721100357 is a prime.

It is a super-2 number, since 2×721116741² = 1040018708300922162, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 721116699 and 721116708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721116743) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126585 + ... + 132158.

It is an arithmetic number, because the mean of its divisors is an integer number (120315960).

Almost surely, 2^721116741 is an apocalyptic number.

It is an amenable number.

721116741 is a deficient number, since it is larger than the sum of its proper divisors (241410939).

721116741 is a wasteful number, since it uses less digits than its factorization.

721116741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259675.

The product of its digits is 2352, while the sum is 30.

The square root of 721116741 is about 26853.6169072250. The cubic root of 721116741 is about 896.7440959072.

Adding to 721116741 its reverse (147611127), we get a palindrome (868727868).

The spelling of 721116741 in words is "seven hundred twenty-one million, one hundred sixteen thousand, seven hundred forty-one".