721072341 has 32 divisors (see below), whose sum is σ = 1167450240. Its totient is φ = 436233600.

The previous prime is 721072337. The next prime is 721072349. The reversal of 721072341 is 143270127.

It is a happy number.

It is not a de Polignac number, because 721072341 - 2² = 721072337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721072349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194481 + ... + 198153.

It is an arithmetic number, because the mean of its divisors is an integer number (36482820).

Almost surely, 2^721072341 is an apocalyptic number.

It is an amenable number.

721072341 is a deficient number, since it is larger than the sum of its proper divisors (446377899).

721072341 is a wasteful number, since it uses less digits than its factorization.

721072341 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4354 (or 4348 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 721072341 is about 26852.7901902205. The cubic root of 721072341 is about 896.7256910024.

The spelling of 721072341 in words is "seven hundred twenty-one million, seventy-two thousand, three hundred forty-one".