16281457 has 2 divisors, whose sum is σ = 16281458. Its totient is φ = 16281456.

The previous prime is 16281451. The next prime is 16281497. The reversal of 16281457 is 75418261.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14318656 + 1962801 = 3784^2 + 1401^2 .

It is an emirp because it is prime and its reverse (75418261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16281457 - 2⁷ = 16281329 is a prime.

It is not a weakly prime, because it can be changed into another prime (16281451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8140728 + 8140729.

It is an arithmetic number, because the mean of its divisors is an integer number (8140729).

Almost surely, 2^16281457 is an apocalyptic number.

It is an amenable number.

16281457 is a deficient number, since it is larger than the sum of its proper divisors (1).

16281457 is an equidigital number, since it uses as much as digits as its factorization.

16281457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 34.

The square root of 16281457 is about 4035.0287483486. The cubic root of 16281457 is about 253.4531864013.

The spelling of 16281457 in words is "sixteen million, two hundred eighty-one thousand, four hundred fifty-seven".