1385012305 has 16 divisors (see below), whose sum is σ = 1765800720. Its totient is φ = 1040884992.

The previous prime is 1385012297. The next prime is 1385012341. The reversal of 1385012305 is 5032105831.

It can be written as a sum of positive squares in 8 ways, for example, as 9492561 + 1375519744 = 3081^2 + 37088^2 .

It is a cyclic number.

It is not a de Polignac number, because 1385012305 - 2³ = 1385012297 is a prime.

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, 123714 + ... + 134443.

It is an arithmetic number, because the mean of its divisors is an integer number (110362545).

Almost surely, 2^1385012305 is an apocalyptic number.

It is an amenable number.

1385012305 is a deficient number, since it is larger than the sum of its proper divisors (380788415).

1385012305 is a wasteful number, since it uses less digits than its factorization.

1385012305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258228.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 1385012305 is about 37215.7534519993. The cubic root of 1385012305 is about 1114.6825709977.

The spelling of 1385012305 in words is "one billion, three hundred eighty-five million, twelve thousand, three hundred five".