1305553901 has 2 divisors, whose sum is σ = 1305553902. Its totient is φ = 1305553900.

The previous prime is 1305553889. The next prime is 1305553927. The reversal of 1305553901 is 1093555031.

1305553901 = 25549² + 25550².

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 652802500 + 652751401 = 25550^2 + 25549^2 .

It is an emirp because it is prime and its reverse (1093555031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1305553901 - 2¹⁰ = 1305552877 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305553801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652776950 + 652776951.

It is an arithmetic number, because the mean of its divisors is an integer number (652776951).

Almost surely, 2^1305553901 is an apocalyptic number.

1305553901 is the 25550-th centered square number.

It is an amenable number.

1305553901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305553901 is an equidigital number, since it uses as much as digits as its factorization.

1305553901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10125, while the sum is 32.

The square root of 1305553901 is about 36132.4494187704. The cubic root of 1305553901 is about 1092.9449026579.

The spelling of 1305553901 in words is "one billion, three hundred five million, five hundred fifty-three thousand, nine hundred one".