12640270 has 8 divisors (see below), whose sum is σ = 22752504. Its totient is φ = 5056104.

The previous prime is 12640261. The next prime is 12640283. The reversal of 12640270 is 7204621.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 632004 + ... + 632023.

It is an arithmetic number, because the mean of its divisors is an integer number (2844063).

Almost surely, 2^12640270 is an apocalyptic number.

12640270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12640270 is a deficient number, since it is larger than the sum of its proper divisors (10112234).

12640270 is a wasteful number, since it uses less digits than its factorization.

12640270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264034.

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 12640270 is about 3555.3157384401. The cubic root of 12640270 is about 232.9443155012.

Adding to 12640270 its reverse (7204621), we get a palindrome (19844891).

The spelling of 12640270 in words is "twelve million, six hundred forty thousand, two hundred seventy".