12987140 has 24 divisors (see below), whose sum is σ = 28154112. Its totient is φ = 5027040.

The previous prime is 12987137. The next prime is 12987151. The reversal of 12987140 is 4178921.

It is a junction number, because it is equal to n+sod(n) for n = 12987097 and 12987106.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9854 + ... + 11093.

It is an arithmetic number, because the mean of its divisors is an integer number (1173088).

Almost surely, 2^12987140 is an apocalyptic number.

12987140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12987140 is an abundant number, since it is smaller than the sum of its proper divisors (15166972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12987140 is a wasteful number, since it uses less digits than its factorization.

12987140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20987 (or 20985 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 12987140 is about 3603.7674730759. The cubic root of 12987140 is about 235.0559094377.

The spelling of 12987140 in words is "twelve million, nine hundred eighty-seven thousand, one hundred forty".