16925281 has 2 divisors, whose sum is σ = 16925282. Its totient is φ = 16925280.

The previous prime is 16925267. The next prime is 16925303. The reversal of 16925281 is 18252961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10595025 + 6330256 = 3255^2 + 2516^2 .

It is a cyclic number.

It is not a de Polignac number, because 16925281 - 2⁹ = 16924769 is a prime.

It is a super-2 number, since 2×16925281² = 572930273857922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16925221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8462640 + 8462641.

It is an arithmetic number, because the mean of its divisors is an integer number (8462641).

Almost surely, 2^16925281 is an apocalyptic number.

It is an amenable number.

16925281 is a deficient number, since it is larger than the sum of its proper divisors (1).

16925281 is an equidigital number, since it uses as much as digits as its factorization.

16925281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 34.

The square root of 16925281 is about 4114.0346376763. The cubic root of 16925281 is about 256.7508928803.

It can be divided in two parts, 169 and 25281, that multiplied together give a square (4272489 = 2067²).

The spelling of 16925281 in words is "sixteen million, nine hundred twenty-five thousand, two hundred eighty-one".