10521761 has 2 divisors, whose sum is σ = 10521762. Its totient is φ = 10521760.

The previous prime is 10521757. The next prime is 10521767. The reversal of 10521761 is 16712501.

10521761 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7480225 + 3041536 = 2735^2 + 1744^2 .

It is a cyclic number.

It is not a de Polignac number, because 10521761 - 2² = 10521757 is a prime.

It is a super-2 number, since 2×10521761² = 221414909082242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (10521767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260880 + 5260881.

It is an arithmetic number, because the mean of its divisors is an integer number (5260881).

Almost surely, 2^10521761 is an apocalyptic number.

It is an amenable number.

10521761 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521761 is an equidigital number, since it uses as much as digits as its factorization.

10521761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 10521761 is about 3243.7264064653. The cubic root of 10521761 is about 219.1271267629.

The spelling of 10521761 in words is "ten million, five hundred twenty-one thousand, seven hundred sixty-one".