721341242 has 8 divisors (see below), whose sum is σ = 1105033536. Its totient is φ = 352996732.

The previous prime is 721341241. The next prime is 721341253. The reversal of 721341242 is 242143127.

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

It is not an unprimeable number, because it can be changed into a prime (721341241) 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 3 ways as a sum of consecutive naturals, for example, 3836828 + ... + 3837015.

It is an arithmetic number, because the mean of its divisors is an integer number (138129192).

Almost surely, 2^721341242 is an apocalyptic number.

721341242 is a deficient number, since it is larger than the sum of its proper divisors (383692294).

721341242 is a wasteful number, since it uses less digits than its factorization.

721341242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673892.

The product of its digits is 2688, while the sum is 26.

The square root of 721341242 is about 26857.7966706132. The cubic root of 721341242 is about 896.8371455928.

Adding to 721341242 its reverse (242143127), we get a palindrome (963484369).

The spelling of 721341242 in words is "seven hundred twenty-one million, three hundred forty-one thousand, two hundred forty-two".