1305262261 has 8 divisors (see below), whose sum is σ = 1382698944. Its totient is φ = 1227898560.

The previous prime is 1305262237. The next prime is 1305262267. The reversal of 1305262261 is 1622625031.

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

It is a cyclic number.

It is not a de Polignac number, because 1305262261 - 2⁵ = 1305262229 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305262267) 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, 21016 + ... + 55246.

It is an arithmetic number, because the mean of its divisors is an integer number (172837368).

Almost surely, 2^1305262261 is an apocalyptic number.

It is an amenable number.

1305262261 is a deficient number, since it is larger than the sum of its proper divisors (77436683).

1305262261 is a wasteful number, since it uses less digits than its factorization.

1305262261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36491.

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

The square root of 1305262261 is about 36128.4134857871. The cubic root of 1305262261 is about 1092.8635144215.

Adding to 1305262261 its reverse (1622625031), we get a palindrome (2927887292).

The spelling of 1305262261 in words is "one billion, three hundred five million, two hundred sixty-two thousand, two hundred sixty-one".