10945721 has 2 divisors, whose sum is σ = 10945722. Its totient is φ = 10945720.

The previous prime is 10945717. The next prime is 10945733. The reversal of 10945721 is 12754901.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8620096 + 2325625 = 2936^2 + 1525^2 .

It is an emirp because it is prime and its reverse (12754901) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10945721 - 2² = 10945717 is a prime.

It is not a weakly prime, because it can be changed into another prime (10945741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5472860 + 5472861.

It is an arithmetic number, because the mean of its divisors is an integer number (5472861).

Almost surely, 2^10945721 is an apocalyptic number.

It is an amenable number.

10945721 is a deficient number, since it is larger than the sum of its proper divisors (1).

10945721 is an equidigital number, since it uses as much as digits as its factorization.

10945721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 10945721 is about 3308.4318037403. The cubic root of 10945721 is about 222.0316014316.

The spelling of 10945721 in words is "ten million, nine hundred forty-five thousand, seven hundred twenty-one".