13061557 has 4 divisors (see below), whose sum is σ = 13177260. Its totient is φ = 12945856.

The previous prime is 13061527. The next prime is 13061561. The reversal of 13061557 is 75516031.

13061557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5171076 + 7890481 = 2274^2 + 2809^2 .

It is a cyclic number.

It is not a de Polignac number, because 13061557 - 2⁷ = 13061429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13061527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57682 + ... + 57907.

It is an arithmetic number, because the mean of its divisors is an integer number (3294315).

Almost surely, 2^13061557 is an apocalyptic number.

It is an amenable number.

13061557 is a deficient number, since it is larger than the sum of its proper divisors (115703).

13061557 is a wasteful number, since it uses less digits than its factorization.

13061557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115702.

The product of its (nonzero) digits is 3150, while the sum is 28.

The square root of 13061557 is about 3614.0776139978. The cubic root of 13061557 is about 235.5040155704.

Adding to 13061557 its reverse (75516031), we get a palindrome (88577588).

The spelling of 13061557 in words is "thirteen million, sixty-one thousand, five hundred fifty-seven".