721145341 has 8 divisors (see below), whose sum is σ = 827375040. Its totient is φ = 615717888.

The previous prime is 721145329. The next prime is 721145357. The reversal of 721145341 is 143541127.

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 721145341 - 2⁷ = 721145213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721145041) 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, 198631 + ... + 202228.

It is an arithmetic number, because the mean of its divisors is an integer number (103421880).

Almost surely, 2^721145341 is an apocalyptic number.

It is an amenable number.

721145341 is a deficient number, since it is larger than the sum of its proper divisors (106229699).

721145341 is a wasteful number, since it uses less digits than its factorization.

721145341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401123.

The product of its digits is 3360, while the sum is 28.

The square root of 721145341 is about 26854.1494186653. The cubic root of 721145341 is about 896.7559509189.

Adding to 721145341 its reverse (143541127), we get a palindrome (864686468).

The spelling of 721145341 in words is "seven hundred twenty-one million, one hundred forty-five thousand, three hundred forty-one".