12992578 has 4 divisors (see below), whose sum is σ = 19488870. Its totient is φ = 6496288.

The previous prime is 12992549. The next prime is 12992591. The reversal of 12992578 is 87529921.

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., 9162729 + 3829849 = 3027^2 + 1957^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3248143 + ... + 3248146.

Almost surely, 2^12992578 is an apocalyptic number.

12992578 is a deficient number, since it is larger than the sum of its proper divisors (6496292).

12992578 is an equidigital number, since it uses as much as digits as its factorization.

12992578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6496291.

The product of its digits is 90720, while the sum is 43.

The square root of 12992578 is about 3604.5218823028. The cubic root of 12992578 is about 235.0887125457.

The spelling of 12992578 in words is "twelve million, nine hundred ninety-two thousand, five hundred seventy-eight".