13021357 has 2 divisors, whose sum is σ = 13021358. Its totient is φ = 13021356.

The previous prime is 13021331. The next prime is 13021367. The reversal of 13021357 is 75312031.

13021357 is digitally balanced in base 2, 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., 10569001 + 2452356 = 3251^2 + 1566^2 .

It is a cyclic number.

It is not a de Polignac number, because 13021357 - 2¹¹ = 13019309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13021367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6510678 + 6510679.

It is an arithmetic number, because the mean of its divisors is an integer number (6510679).

Almost surely, 2^13021357 is an apocalyptic number.

It is an amenable number.

13021357 is a deficient number, since it is larger than the sum of its proper divisors (1).

13021357 is an equidigital number, since it uses as much as digits as its factorization.

13021357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 13021357 is about 3608.5117430874. The cubic root of 13021357 is about 235.2621610289.

Adding to 13021357 its reverse (75312031), we get a palindrome (88333388).

The spelling of 13021357 in words is "thirteen million, twenty-one thousand, three hundred fifty-seven".