1305345345 has 16 divisors (see below), whose sum is σ = 2089971072. Its totient is φ = 695711360.

The previous prime is 1305345341. The next prime is 1305345373. The reversal of 1305345345 is 5435435031.

It is not a de Polignac number, because 1305345345 - 2² = 1305345341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1305345341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6132 + ... + 51461.

It is an arithmetic number, because the mean of its divisors is an integer number (130623192).

Almost surely, 2^1305345345 is an apocalyptic number.

1305345345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305345345 is a deficient number, since it is larger than the sum of its proper divisors (784625727).

1305345345 is a wasteful number, since it uses less digits than its factorization.

1305345345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59112.

The product of its (nonzero) digits is 54000, while the sum is 33.

The square root of 1305345345 is about 36129.5633103972. The cubic root of 1305345345 is about 1092.8867019827.

The spelling of 1305345345 in words is "one billion, three hundred five million, three hundred forty-five thousand, three hundred forty-five".