13125578 has 8 divisors (see below), whose sum is σ = 20146368. Its totient is φ = 6410124.

The previous prime is 13125569. The next prime is 13125611. The reversal of 13125578 is 87552131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76226 + ... + 76397.

It is an arithmetic number, because the mean of its divisors is an integer number (2518296).

Almost surely, 2^13125578 is an apocalyptic number.

13125578 is a deficient number, since it is larger than the sum of its proper divisors (7020790).

13125578 is a wasteful number, since it uses less digits than its factorization.

13125578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152668.

The product of its digits is 8400, while the sum is 32.

The square root of 13125578 is about 3622.9239572478. The cubic root of 13125578 is about 235.8881616026. Note that the first 3 decimals are identical.

The spelling of 13125578 in words is "thirteen million, one hundred twenty-five thousand, five hundred seventy-eight".