13145577 has 4 divisors (see below), whose sum is σ = 17527440. Its totient is φ = 8763716.

The previous prime is 13145557. The next prime is 13145597. The reversal of 13145577 is 77554131.

13145577 is digitally balanced in base 2, 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, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (13145557) and next prime (13145597).

It is a cyclic number.

It is not a de Polignac number, because 13145577 - 2⁶ = 13145513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13145507) 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, 2190927 + ... + 2190932.

It is an arithmetic number, because the mean of its divisors is an integer number (4381860).

Almost surely, 2^13145577 is an apocalyptic number.

It is an amenable number.

13145577 is a deficient number, since it is larger than the sum of its proper divisors (4381863).

13145577 is an equidigital number, since it uses as much as digits as its factorization.

13145577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4381862.

The product of its digits is 14700, while the sum is 33.

The square root of 13145577 is about 3625.6829701451. The cubic root of 13145577 is about 236.0079057488.

The spelling of 13145577 in words is "thirteen million, one hundred forty-five thousand, five hundred seventy-seven".