1262065261 has 8 divisors (see below), whose sum is σ = 1336617720. Its totient is φ = 1187547648.

The previous prime is 1262065243. The next prime is 1262065271. The reversal of 1262065261 is 1625602621.

It can be written as a sum of positive squares in 4 ways, for example, as 489781161 + 772284100 = 22131^2 + 27790^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1262065261 - 2⁵ = 1262065229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1262065241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122145 + ... + 132073.

It is an arithmetic number, because the mean of its divisors is an integer number (167077215).

Almost surely, 2^1262065261 is an apocalyptic number.

It is an amenable number.

1262065261 is a deficient number, since it is larger than the sum of its proper divisors (74552459).

1262065261 is an equidigital number, since it uses as much as digits as its factorization.

1262065261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17423.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1262065261 is about 35525.5578562814. The cubic root of 1262065261 is about 1080.6720956640.

Adding to 1262065261 its reverse (1625602621), we get a palindrome (2887667882).

The spelling of 1262065261 in words is "one billion, two hundred sixty-two million, sixty-five thousand, two hundred sixty-one".