12640292 has 12 divisors (see below), whose sum is σ = 25280640. Its totient is φ = 5417256.

The previous prime is 12640291. The next prime is 12640297. The reversal of 12640292 is 29204621.

12640292 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12640291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225692 + ... + 225747.

It is an arithmetic number, because the mean of its divisors is an integer number (2106720).

Almost surely, 2^12640292 is an apocalyptic number.

It is an amenable number.

12640292 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.

12640292 is a wasteful number, since it uses less digits than its factorization.

12640292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451450 (or 451448 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 12640292 is about 3555.3188323975. The cubic root of 12640292 is about 232.9444506453.

The spelling of 12640292 in words is "twelve million, six hundred forty thousand, two hundred ninety-two".