1006375721 has 8 divisors (see below), whose sum is σ = 1084132224. Its totient is φ = 928668240.

The previous prime is 1006375687. The next prime is 1006375729. The reversal of 1006375721 is 1275736001.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1006375721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1006375729) 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, 38066 + ... + 58836.

It is an arithmetic number, because the mean of its divisors is an integer number (135516528).

Almost surely, 2^1006375721 is an apocalyptic number.

It is an amenable number.

1006375721 is a deficient number, since it is larger than the sum of its proper divisors (77756503).

1006375721 is a wasteful number, since it uses less digits than its factorization.

1006375721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24511.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 1006375721 is about 31723.4254297987. The cubic root of 1006375721 is about 1002.1207396174.

The spelling of 1006375721 in words is "one billion, six million, three hundred seventy-five thousand, seven hundred twenty-one".