1331280241 has 2 divisors, whose sum is σ = 1331280242. Its totient is φ = 1331280240.

The previous prime is 1331280221. The next prime is 1331280259. The reversal of 1331280241 is 1420821331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1308992400 + 22287841 = 36180^2 + 4721^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331280241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331280221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665640120 + 665640121.

It is an arithmetic number, because the mean of its divisors is an integer number (665640121).

Almost surely, 2^1331280241 is an apocalyptic number.

It is an amenable number.

1331280241 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331280241 is an equidigital number, since it uses as much as digits as its factorization.

1331280241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 1331280241 is about 36486.7132117981. The cubic root of 1331280241 is about 1100.0771959598.

The spelling of 1331280241 in words is "one billion, three hundred thirty-one million, two hundred eighty thousand, two hundred forty-one".