1305424261 has 2 divisors, whose sum is σ = 1305424262. Its totient is φ = 1305424260.

The previous prime is 1305424259. The next prime is 1305424273. The reversal of 1305424261 is 1624245031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1233344161 + 72080100 = 35119^2 + 8490^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305424261 - 2¹ = 1305424259 is a prime.

It is a super-2 number, since 2×1305424261² = 3408265002414792242, which contains 22 as substring.

Together with 1305424259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305424661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652712130 + 652712131.

It is an arithmetic number, because the mean of its divisors is an integer number (652712131).

Almost surely, 2^1305424261 is an apocalyptic number.

It is an amenable number.

1305424261 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305424261 is an equidigital number, since it uses as much as digits as its factorization.

1305424261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1305424261 is about 36130.6554189099. The cubic root of 1305424261 is about 1092.9087254034.

Adding to 1305424261 its reverse (1624245031), we get a palindrome (2929669292).

The spelling of 1305424261 in words is "one billion, three hundred five million, four hundred twenty-four thousand, two hundred sixty-one".