1305293085 has 12 divisors (see below), whose sum is σ = 2262508092. Its totient is φ = 696156288.

The previous prime is 1305293057. The next prime is 1305293111. The reversal of 1305293085 is 5803925031.

It can be written as a sum of positive squares in 2 ways, for example, as 485673444 + 819619641 = 22038^2 + 28629^2 .

It is not a de Polignac number, because 1305293085 - 2¹⁰ = 1305292061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14503212 + ... + 14503301.

It is an arithmetic number, because the mean of its divisors is an integer number (188542341).

Almost surely, 2^1305293085 is an apocalyptic number.

1305293085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1305293085 is a deficient number, since it is larger than the sum of its proper divisors (957215007).

1305293085 is a wasteful number, since it uses less digits than its factorization.

1305293085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29006524 (or 29006521 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 1305293085 is about 36128.8400727175. The cubic root of 1305293085 is about 1092.8721170757.

The spelling of 1305293085 in words is "one billion, three hundred five million, two hundred ninety-three thousand, eighty-five".