12451987 has 16 divisors (see below), whose sum is σ = 13434624. Its totient is φ = 11520000.

The previous prime is 12451963. The next prime is 12451997. The reversal of 12451987 is 78915421.

It is a cyclic number.

It is not a de Polignac number, because 12451987 - 2¹¹ = 12449939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12451997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123237 + ... + 123337.

It is an arithmetic number, because the mean of its divisors is an integer number (839664).

Almost surely, 2^12451987 is an apocalyptic number.

12451987 is a deficient number, since it is larger than the sum of its proper divisors (982637).

12451987 is a wasteful number, since it uses less digits than its factorization.

12451987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270.

The product of its digits is 20160, while the sum is 37.

The square root of 12451987 is about 3528.7373095769. The cubic root of 12451987 is about 231.7819182822.

The spelling of 12451987 in words is "twelve million, four hundred fifty-one thousand, nine hundred eighty-seven".