12512890 has 32 divisors (see below), whose sum is σ = 24521616. Its totient is φ = 4569600.

The previous prime is 12512881. The next prime is 12512911. The reversal of 12512890 is 9821521.

It can be written as a sum of positive squares in 8 ways, for example, as 6066369 + 6446521 = 2463^2 + 2539^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12654 + ... + 13606.

Almost surely, 2^12512890 is an apocalyptic number.

12512890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12512890 is a deficient number, since it is larger than the sum of its proper divisors (12008726).

12512890 is a wasteful number, since it uses less digits than its factorization.

12512890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 12512890 is about 3537.3563575077. The cubic root of 12512890 is about 232.1591877156.

The spelling of 12512890 in words is "twelve million, five hundred twelve thousand, eight hundred ninety".