13061857 has 2 divisors, whose sum is σ = 13061858. Its totient is φ = 13061856.

The previous prime is 13061849. The next prime is 13061891. The reversal of 13061857 is 75816031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10342656 + 2719201 = 3216^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 13061857 - 2³ = 13061849 is a prime.

It is a super-2 number, since 2×13061857² = 341224216576898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13061837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6530928 + 6530929.

It is an arithmetic number, because the mean of its divisors is an integer number (6530929).

Almost surely, 2^13061857 is an apocalyptic number.

It is an amenable number.

13061857 is a deficient number, since it is larger than the sum of its proper divisors (1).

13061857 is an equidigital number, since it uses as much as digits as its factorization.

13061857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 13061857 is about 3614.1191181255. The cubic root of 13061857 is about 235.5058185883.

Adding to 13061857 its reverse (75816031), we get a palindrome (88877888).

It can be divided in two parts, 1306 and 1857, that multiplied together give a palindrome (2425242).

The spelling of 13061857 in words is "thirteen million, sixty-one thousand, eight hundred fifty-seven".