1261226053 has 2 divisors, whose sum is σ = 1261226054. Its totient is φ = 1261226052.

The previous prime is 1261226047. The next prime is 1261226063. The reversal of 1261226053 is 3506221621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1259327169 + 1898884 = 35487^2 + 1378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1261226053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1261226003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630613026 + 630613027.

It is an arithmetic number, because the mean of its divisors is an integer number (630613027).

Almost surely, 2^1261226053 is an apocalyptic number.

It is an amenable number.

1261226053 is a deficient number, since it is larger than the sum of its proper divisors (1).

1261226053 is an equidigital number, since it uses as much as digits as its factorization.

1261226053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 1261226053 is about 35513.7445646048. The cubic root of 1261226053 is about 1080.4325122378.

Adding to 1261226053 its reverse (3506221621), we get a palindrome (4767447674).

The spelling of 1261226053 in words is "one billion, two hundred sixty-one million, two hundred twenty-six thousand, fifty-three".