1261153301 has 2 divisors, whose sum is σ = 1261153302. Its totient is φ = 1261153300.

The previous prime is 1261153297. The next prime is 1261153349. The reversal of 1261153301 is 1033511621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1109223025 + 151930276 = 33305^2 + 12326^2 .

It is an emirp because it is prime and its reverse (1033511621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1261153301 - 2² = 1261153297 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 (1261153351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630576650 + 630576651.

It is an arithmetic number, because the mean of its divisors is an integer number (630576651).

Almost surely, 2^1261153301 is an apocalyptic number.

It is an amenable number.

1261153301 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261153301 is an equidigital number, since it uses as much as digits as its factorization.

1261153301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1261153301 is about 35512.7202703482. The cubic root of 1261153301 is about 1080.4117374430.

Adding to 1261153301 its reverse (1033511621), we get a palindrome (2294664922).

The spelling of 1261153301 in words is "one billion, two hundred sixty-one million, one hundred fifty-three thousand, three hundred one".