12740890 has 8 divisors (see below), whose sum is σ = 22933620. Its totient is φ = 5096352.

The previous prime is 12740869. The next prime is 12740891. The reversal of 12740890 is 9804721.

It can be written as a sum of positive squares in 2 ways, for example, as 12020089 + 720801 = 3467^2 + 849^2 .

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

It is not an unprimeable number, because it can be changed into a prime (12740891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 637035 + ... + 637054.

Almost surely, 2^12740890 is an apocalyptic number.

12740890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12740890 is a deficient number, since it is larger than the sum of its proper divisors (10192730).

12740890 is a wasteful number, since it uses less digits than its factorization.

12740890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1274096.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 12740890 is about 3569.4383311664. The cubic root of 12740890 is about 233.5607827492.

The spelling of 12740890 in words is "twelve million, seven hundred forty thousand, eight hundred ninety".