1305401249 has 2 divisors, whose sum is σ = 1305401250. Its totient is φ = 1305401248.

The previous prime is 1305401233. The next prime is 1305401261. The reversal of 1305401249 is 9421045031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1299963025 + 5438224 = 36055^2 + 2332^2 .

It is an emirp because it is prime and its reverse (9421045031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1305401249 - 2⁴ = 1305401233 is a prime.

It is not a weakly prime, because it can be changed into another prime (1305401269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652700624 + 652700625.

It is an arithmetic number, because the mean of its divisors is an integer number (652700625).

Almost surely, 2^1305401249 is an apocalyptic number.

It is an amenable number.

1305401249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305401249 is an equidigital number, since it uses as much as digits as its factorization.

1305401249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 1305401249 is about 36130.3369621707. The cubic root of 1305401249 is about 1092.9023034392.

The spelling of 1305401249 in words is "one billion, three hundred five million, four hundred one thousand, two hundred forty-nine".