12575578 has 4 divisors (see below), whose sum is σ = 18863370. Its totient is φ = 6287788.

The previous prime is 12575569. The next prime is 12575609. The reversal of 12575578 is 87557521.

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

It can be written as a sum of positive squares in only one way, i.e., 8025889 + 4549689 = 2833^2 + 2133^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12575578.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3143893 + ... + 3143896.

Almost surely, 2^12575578 is an apocalyptic number.

12575578 is a deficient number, since it is larger than the sum of its proper divisors (6287792).

12575578 is an equidigital number, since it uses as much as digits as its factorization.

12575578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6287791.

The product of its digits is 98000, while the sum is 40.

The square root of 12575578 is about 3546.2061417803. The cubic root of 12575578 is about 232.5462381542.

The spelling of 12575578 in words is "twelve million, five hundred seventy-five thousand, five hundred seventy-eight".