12640484 has 6 divisors (see below), whose sum is σ = 22120854. Its totient is φ = 6320240.

The previous prime is 12640477. The next prime is 12640489. The reversal of 12640484 is 48404621.

It can be written as a sum of positive squares in only one way, i.e., 9784384 + 2856100 = 3128^2 + 1690^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1580057 + ... + 1580064.

It is an arithmetic number, because the mean of its divisors is an integer number (3686809).

Almost surely, 2^12640484 is an apocalyptic number.

It is an amenable number.

12640484 is a deficient number, since it is larger than the sum of its proper divisors (9480370).

12640484 is a wasteful number, since it uses less digits than its factorization.

12640484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160125 (or 3160123 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 12640484 is about 3555.3458340927. The cubic root of 12640484 is about 232.9456300776.

The spelling of 12640484 in words is "twelve million, six hundred forty thousand, four hundred eighty-four".