13860257 has 2 divisors, whose sum is σ = 13860258. Its totient is φ = 13860256.

The previous prime is 13860251. The next prime is 13860277. The reversal of 13860257 is 75206831.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6974881 + 6885376 = 2641^2 + 2624^2 .

It is a cyclic number.

It is not a de Polignac number, because 13860257 - 2⁸ = 13860001 is a prime.

It is not a weakly prime, because it can be changed into another prime (13860251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6930128 + 6930129.

It is an arithmetic number, because the mean of its divisors is an integer number (6930129).

Almost surely, 2^13860257 is an apocalyptic number.

It is an amenable number.

13860257 is a deficient number, since it is larger than the sum of its proper divisors (1).

13860257 is an equidigital number, since it uses as much as digits as its factorization.

13860257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 13860257 is about 3722.9366097209. The cubic root of 13860257 is about 240.2096374325.

The spelling of 13860257 in words is "thirteen million, eight hundred sixty thousand, two hundred fifty-seven".