1281349 has 2 divisors, whose sum is σ = 1281350. Its totient is φ = 1281348.

The previous prime is 1281331. The next prime is 1281367. The reversal of 1281349 is 9431821.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1281331) and next prime (1281367).

It can be written as a sum of positive squares in only one way, i.e., 1036324 + 245025 = 1018^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 1281349 - 2⁵ = 1281317 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1281389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 640674 + 640675.

It is an arithmetic number, because the mean of its divisors is an integer number (640675).

2^1281349 is an apocalyptic number.

It is an amenable number.

1281349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1281349 is an equidigital number, since it uses as much as digits as its factorization.

1281349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 28.

The square root of 1281349 is about 1131.9668723068. The cubic root of 1281349 is about 108.6148344944.

The spelling of 1281349 in words is "one million, two hundred eighty-one thousand, three hundred forty-nine".