13020557 has 4 divisors (see below), whose sum is σ = 14204256. Its totient is φ = 11836860.

The previous prime is 13020541. The next prime is 13020577. The reversal of 13020557 is 75502031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13020557 - 2⁴ = 13020541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13020577) 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 in 3 ways as a sum of consecutive naturals, for example, 591833 + ... + 591854.

It is an arithmetic number, because the mean of its divisors is an integer number (3551064).

Almost surely, 2^13020557 is an apocalyptic number.

It is an amenable number.

13020557 is a deficient number, since it is larger than the sum of its proper divisors (1183699).

13020557 is a wasteful number, since it uses less digits than its factorization.

13020557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1183698.

The product of its (nonzero) digits is 1050, while the sum is 23.

The square root of 13020557 is about 3608.4008923622. The cubic root of 13020557 is about 235.2573429549.

Adding to 13020557 its reverse (75502031), we get a palindrome (88522588).

The spelling of 13020557 in words is "thirteen million, twenty thousand, five hundred fifty-seven".