721403041 has 8 divisors (see below), whose sum is σ = 764969184. Its totient is φ = 677962560.

The previous prime is 721403017. The next prime is 721403051. The reversal of 721403041 is 140304127.

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 721403041 - 2²¹ = 719305889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721403051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19455 + ... + 42676.

It is an arithmetic number, because the mean of its divisors is an integer number (95621148).

Almost surely, 2^721403041 is an apocalyptic number.

It is an amenable number.

721403041 is a deficient number, since it is larger than the sum of its proper divisors (43566143).

721403041 is a wasteful number, since it uses less digits than its factorization.

721403041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62831.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 721403041 is about 26858.9471312634. The cubic root of 721403041 is about 896.8627562436.

Adding to 721403041 its reverse (140304127), we get a palindrome (861707168).

The spelling of 721403041 in words is "seven hundred twenty-one million, four hundred three thousand, forty-one".