12357987 has 4 divisors (see below), whose sum is σ = 16477320. Its totient is φ = 8238656.

The previous prime is 12357977. The next prime is 12358001. The reversal of 12357987 is 78975321.

12357987 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 12357987 - 2⁴ = 12357971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12357907) 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, 2059662 + ... + 2059667.

It is an arithmetic number, because the mean of its divisors is an integer number (4119330).

Almost surely, 2^12357987 is an apocalyptic number.

12357987 is a deficient number, since it is larger than the sum of its proper divisors (4119333).

12357987 is an equidigital number, since it uses as much as digits as its factorization.

12357987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119332.

The product of its digits is 105840, while the sum is 42.

The square root of 12357987 is about 3515.3928656695. The cubic root of 12357987 is about 231.1972042122.

The spelling of 12357987 in words is "twelve million, three hundred fifty-seven thousand, nine hundred eighty-seven".