281449361 has 2 divisors, whose sum is σ = 281449362. Its totient is φ = 281449360.

The previous prime is 281449351. The next prime is 281449393. The reversal of 281449361 is 163944182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 281199361 + 250000 = 16769^2 + 500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-281449361 is a prime.

It is not a weakly prime, because it can be changed into another prime (281449351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140724680 + 140724681.

It is an arithmetic number, because the mean of its divisors is an integer number (140724681).

Almost surely, 2^281449361 is an apocalyptic number.

It is an amenable number.

281449361 is a deficient number, since it is larger than the sum of its proper divisors (1).

281449361 is an equidigital number, since it uses as much as digits as its factorization.

281449361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 38.

The square root of 281449361 is about 16776.4525749635. The cubic root of 281449361 is about 655.3401189889.

The spelling of 281449361 in words is "two hundred eighty-one million, four hundred forty-nine thousand, three hundred sixty-one".