13405057 has 2 divisors, whose sum is σ = 13405058. Its totient is φ = 13405056.

The previous prime is 13405037. The next prime is 13405069. The reversal of 13405057 is 75050431.

13405057 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7568001 + 5837056 = 2751^2 + 2416^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13405057 is a prime.

It is not a weakly prime, because it can be changed into another prime (13405037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702528 + 6702529.

It is an arithmetic number, because the mean of its divisors is an integer number (6702529).

Almost surely, 2^13405057 is an apocalyptic number.

It is an amenable number.

13405057 is a deficient number, since it is larger than the sum of its proper divisors (1).

13405057 is an equidigital number, since it uses as much as digits as its factorization.

13405057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 13405057 is about 3661.2917119509. The cubic root of 13405057 is about 237.5506492163.

Adding to 13405057 its reverse (75050431), we get a palindrome (88455488).

The spelling of 13405057 in words is "thirteen million, four hundred five thousand, fifty-seven".