721001227 has 8 divisors (see below), whose sum is σ = 761024000. Its totient is φ = 681186024.

The previous prime is 721001221. The next prime is 721001249. The reversal of 721001227 is 722100127.

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

It is a de Polignac number, because none of the positive numbers 2^k-721001227 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 721001198 and 721001207.

It is not an unprimeable number, because it can be changed into a prime (721001221) 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 7 ways as a sum of consecutive naturals, for example, 44727 + ... + 58672.

It is an arithmetic number, because the mean of its divisors is an integer number (95128000).

Almost surely, 2^721001227 is an apocalyptic number.

721001227 is a deficient number, since it is larger than the sum of its proper divisors (40022773).

721001227 is a wasteful number, since it uses less digits than its factorization.

721001227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103785.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 721001227 is about 26851.4660121193. The cubic root of 721001227 is about 896.6962109056.

The spelling of 721001227 in words is "seven hundred twenty-one million, one thousand, two hundred twenty-seven".