13071385 has 16 divisors (see below), whose sum is σ = 16887312. Its totient is φ = 9676800.

The previous prime is 13071371. The next prime is 13071413. The reversal of 13071385 is 58317031.

13071385 = 2556² + 2557².

13071385 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 4214809 + 8856576 = 2053^2 + 2976^2 .

It is a de Polignac number, because none of the positive numbers 2^k-13071385 is a prime.

It is a super-2 number, since 2×13071385² = 341722211636450, which contains 22 as substring.

It is a Duffinian number.

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, 3925 + ... + 6445.

It is an arithmetic number, because the mean of its divisors is an integer number (1055457).

Almost surely, 2^13071385 is an apocalyptic number.

13071385 is the 2557-th centered square number.

It is an amenable number.

13071385 is a deficient number, since it is larger than the sum of its proper divisors (3815927).

13071385 is a wasteful number, since it uses less digits than its factorization.

13071385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 13071385 is about 3615.4370413548. The cubic root of 13071385 is about 235.5630680808.

It can be divided in two parts, 13071 and 385, that added together give a square (13456 = 116²).

The spelling of 13071385 in words is "thirteen million, seventy-one thousand, three hundred eighty-five".