12655740 has 24 divisors (see below), whose sum is σ = 35436240. Its totient is φ = 3374848.

The previous prime is 12655733. The next prime is 12655751. The reversal of 12655740 is 4755621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 12655698 and 12655707.

It is a congruent number.

It is an unprimeable number.

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, 105405 + ... + 105524.

It is an arithmetic number, because the mean of its divisors is an integer number (1476510).

Almost surely, 2^12655740 is an apocalyptic number.

12655740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12655740 is an abundant number, since it is smaller than the sum of its proper divisors (22780500).

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

12655740 is a wasteful number, since it uses less digits than its factorization.

12655740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210941 (or 210939 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 12655740 is about 3557.4906886737. The cubic root of 12655740 is about 233.0393076554.

The spelling of 12655740 in words is "twelve million, six hundred fifty-five thousand, seven hundred forty".