1305748945 has 16 divisors (see below), whose sum is σ = 1587983040. Its totient is φ = 1030578624.

The previous prime is 1305748897. The next prime is 1305748979. The reversal of 1305748945 is 5498475031.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1305748945 is a prime.

It is a super-2 number, since 2×1305748945² = 3409960614737226050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1305748895 and 1305748904.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 374671 + ... + 378139.

It is an arithmetic number, because the mean of its divisors is an integer number (99248940).

Almost surely, 2^1305748945 is an apocalyptic number.

It is an amenable number.

1305748945 is a deficient number, since it is larger than the sum of its proper divisors (282234095).

1305748945 is an equidigital number, since it uses as much as digits as its factorization.

1305748945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4464.

The product of its (nonzero) digits is 604800, while the sum is 46.

The square root of 1305748945 is about 36135.1483323370. The cubic root of 1305748945 is about 1092.9993269986. Note that the first 3 decimals are identical.

The spelling of 1305748945 in words is "one billion, three hundred five million, seven hundred forty-eight thousand, nine hundred forty-five".