12765890 has 8 divisors (see below), whose sum is σ = 22978620. Its totient is φ = 5106352.

The previous prime is 12765881. The next prime is 12765901. The reversal of 12765890 is 9856721.

It can be written as a sum of positive squares in 2 ways, for example, as 12397441 + 368449 = 3521^2 + 607^2 .

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

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 638285 + ... + 638304.

Almost surely, 2^12765890 is an apocalyptic number.

12765890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12765890 is a deficient number, since it is larger than the sum of its proper divisors (10212730).

12765890 is a wasteful number, since it uses less digits than its factorization.

12765890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276596.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 12765890 is about 3572.9385665024. The cubic root of 12765890 is about 233.7134461986.

The spelling of 12765890 in words is "twelve million, seven hundred sixty-five thousand, eight hundred ninety".