12690987 has 8 divisors (see below), whose sum is σ = 17281536. Its totient is φ = 8280552.

The previous prime is 12690973. The next prime is 12690991. The reversal of 12690987 is 78909621.

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

It is not a de Polignac number, because 12690987 - 2⁴ = 12690971 is a prime.

It is a super-2 number, since 2×12690987² = 322122302068338, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12690907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44863 + ... + 45144.

It is an arithmetic number, because the mean of its divisors is an integer number (2160192).

Almost surely, 2^12690987 is an apocalyptic number.

12690987 is a deficient number, since it is larger than the sum of its proper divisors (4590549).

12690987 is an equidigital number, since it uses as much as digits as its factorization.

12690987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90057.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 12690987 is about 3562.4411574088. The cubic root of 12690987 is about 233.2554499702.

The spelling of 12690987 in words is "twelve million, six hundred ninety thousand, nine hundred eighty-seven".