1205261501 has 2 divisors, whose sum is σ = 1205261502. Its totient is φ = 1205261500.

The previous prime is 1205261483. The next prime is 1205261507. The reversal of 1205261501 is 1051625021.

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., 1193633401 + 11628100 = 34549^2 + 3410^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205261501 - 2⁶ = 1205261437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205261507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602630750 + 602630751.

It is an arithmetic number, because the mean of its divisors is an integer number (602630751).

Almost surely, 2^1205261501 is an apocalyptic number.

It is an amenable number.

1205261501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205261501 is an equidigital number, since it uses as much as digits as its factorization.

1205261501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1205261501 is about 34716.8763139773. The cubic root of 1205261501 is about 1064.2094101011.

Adding to 1205261501 its reverse (1051625021), we get a palindrome (2256886522).

The spelling of 1205261501 in words is "one billion, two hundred five million, two hundred sixty-one thousand, five hundred one".