10491281 has 2 divisors, whose sum is σ = 10491282. Its totient is φ = 10491280.

The previous prime is 10491277. The next prime is 10491307. The reversal of 10491281 is 18219401.

It is an a-pointer prime, because the next prime (10491307) can be obtained adding 10491281 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10297681 + 193600 = 3209^2 + 440^2 .

It is a cyclic number.

It is not a de Polignac number, because 10491281 - 2² = 10491277 is a prime.

It is a super-2 number, since 2×10491281² = 220133954041922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10491281.

It is not a weakly prime, because it can be changed into another prime (10491241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5245640 + 5245641.

It is an arithmetic number, because the mean of its divisors is an integer number (5245641).

Almost surely, 2^10491281 is an apocalyptic number.

It is an amenable number.

10491281 is a deficient number, since it is larger than the sum of its proper divisors (1).

10491281 is an equidigital number, since it uses as much as digits as its factorization.

10491281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 10491281 is about 3239.0246988870. The cubic root of 10491281 is about 218.9153290553.

The spelling of 10491281 in words is "ten million, four hundred ninety-one thousand, two hundred eighty-one".