1281223341 has 6 divisors (see below), whose sum is σ = 1850655950. Its totient is φ = 854148888.

The previous prime is 1281223319. The next prime is 1281223417. The reversal of 1281223341 is 1433221821.

It can be written as a sum of positive squares in only one way, i.e., 1272348900 + 8874441 = 35670^2 + 2979^2 .

It is not a de Polignac number, because 1281223341 - 2⁷ = 1281223213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281224341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71179066 + ... + 71179083.

Almost surely, 2^1281223341 is an apocalyptic number.

It is an amenable number.

1281223341 is a deficient number, since it is larger than the sum of its proper divisors (569432609).

1281223341 is a wasteful number, since it uses less digits than its factorization.

1281223341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142358155 (or 142358152 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1281223341 is about 35794.1802671887. The cubic root of 1281223341 is about 1086.1128384122.

The spelling of 1281223341 in words is "one billion, two hundred eighty-one million, two hundred twenty-three thousand, three hundred forty-one".