12740087 has 4 divisors (see below), whose sum is σ = 12980520. Its totient is φ = 12499656.

The previous prime is 12740081. The next prime is 12740107. The reversal of 12740087 is 78004721.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12740087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12740081) 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, 120137 + ... + 120242.

It is an arithmetic number, because the mean of its divisors is an integer number (3245130).

Almost surely, 2^12740087 is an apocalyptic number.

12740087 is a deficient number, since it is larger than the sum of its proper divisors (240433).

12740087 is an equidigital number, since it uses as much as digits as its factorization.

12740087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240432.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 12740087 is about 3569.3258467111. The cubic root of 12740087 is about 233.5558758903. Note that the first 3 decimals are identical.

The spelling of 12740087 in words is "twelve million, seven hundred forty thousand, eighty-seven".