721482541 has 8 divisors (see below), whose sum is σ = 777543480. Its totient is φ = 665501952.

The previous prime is 721482539. The next prime is 721482547. The reversal of 721482541 is 145284127.

It can be written as a sum of positive squares in 4 ways, for example, as 4796100 + 716686441 = 2190^2 + 26771^2 .

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 721482541 - 2¹ = 721482539 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 721482497 and 721482506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721482547) 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, 736 + ... + 37993.

It is an arithmetic number, because the mean of its divisors is an integer number (97192935).

Almost surely, 2^721482541 is an apocalyptic number.

It is an amenable number.

721482541 is a deficient number, since it is larger than the sum of its proper divisors (56060939).

721482541 is a wasteful number, since it uses less digits than its factorization.

721482541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40175.

The product of its digits is 17920, while the sum is 34.

The square root of 721482541 is about 26860.4270442597. The cubic root of 721482541 is about 896.8957003660.

The spelling of 721482541 in words is "seven hundred twenty-one million, four hundred eighty-two thousand, five hundred forty-one".