1305122505 has 32 divisors (see below), whose sum is σ = 2115365760. Its totient is φ = 687052800.

The previous prime is 1305122491. The next prime is 1305122527. The reversal of 1305122505 is 5052215031.

It is a happy number.

It is not a de Polignac number, because 1305122505 - 2¹⁷ = 1304991433 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 573049 + ... + 575321.

It is an arithmetic number, because the mean of its divisors is an integer number (66105180).

Almost surely, 2^1305122505 is an apocalyptic number.

1305122505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305122505 is a deficient number, since it is larger than the sum of its proper divisors (810243255).

1305122505 is a wasteful number, since it uses less digits than its factorization.

1305122505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2761.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 1305122505 is about 36126.4792776711. The cubic root of 1305122505 is about 1092.8245082924.

Adding to 1305122505 its reverse (5052215031), we get a palindrome (6357337536).

The spelling of 1305122505 in words is "one billion, three hundred five million, one hundred twenty-two thousand, five hundred five".