12640494 has 8 divisors (see below), whose sum is σ = 25281000. Its totient is φ = 4213496.

The previous prime is 12640489. The next prime is 12640499. The reversal of 12640494 is 49404621.

It is an interprime number because it is at equal distance from previous prime (12640489) and next prime (12640499).

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

12640494 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640499) 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 3 ways as a sum of consecutive naturals, for example, 1053369 + ... + 1053380.

It is an arithmetic number, because the mean of its divisors is an integer number (3160125).

Almost surely, 2^12640494 is an apocalyptic number.

12640494 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12640494 is a wasteful number, since it uses less digits than its factorization.

12640494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2106754.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 12640494 is about 3555.3472404253. The cubic root of 12640494 is about 232.9456915061.

The spelling of 12640494 in words is "twelve million, six hundred forty thousand, four hundred ninety-four".