12640274 has 8 divisors (see below), whose sum is σ = 19363968. Its totient is φ = 6185620.

The previous prime is 12640261. The next prime is 12640283. The reversal of 12640274 is 47204621.

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

It is an unprimeable number.

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, 67142 + ... + 67329.

It is an arithmetic number, because the mean of its divisors is an integer number (2420496).

Almost surely, 2^12640274 is an apocalyptic number.

12640274 is a deficient number, since it is larger than the sum of its proper divisors (6723694).

12640274 is a wasteful number, since it uses less digits than its factorization.

12640274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134520.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 12640274 is about 3555.3163009780. The cubic root of 12640274 is about 232.9443400729.

Adding to 12640274 its reverse (47204621), we get a palindrome (59844895).

The spelling of 12640274 in words is "twelve million, six hundred forty thousand, two hundred seventy-four".