13857761 has 2 divisors, whose sum is σ = 13857762. Its totient is φ = 13857760.

The previous prime is 13857757. The next prime is 13857769. The reversal of 13857761 is 16775831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8880400 + 4977361 = 2980^2 + 2231^2 .

It is a cyclic number.

It is not a de Polignac number, because 13857761 - 2² = 13857757 is a prime.

It is not a weakly prime, because it can be changed into another prime (13857769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6928880 + 6928881.

It is an arithmetic number, because the mean of its divisors is an integer number (6928881).

Almost surely, 2^13857761 is an apocalyptic number.

It is an amenable number.

13857761 is a deficient number, since it is larger than the sum of its proper divisors (1).

13857761 is an equidigital number, since it uses as much as digits as its factorization.

13857761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 13857761 is about 3722.6013753825. The cubic root of 13857761 is about 240.1952173235.

The spelling of 13857761 in words is "thirteen million, eight hundred fifty-seven thousand, seven hundred sixty-one".