12621270 has 32 divisors (see below), whose sum is σ = 30427488. Its totient is φ = 3350528.

The previous prime is 12621269. The next prime is 12621289. The reversal of 12621270 is 7212621.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6892 + ... + 8528.

It is an arithmetic number, because the mean of its divisors is an integer number (950859).

Almost surely, 2^12621270 is an apocalyptic number.

12621270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12621270 is an abundant number, since it is smaller than the sum of its proper divisors (17806218).

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

12621270 is a wasteful number, since it uses less digits than its factorization.

12621270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 12621270 is about 3552.6426783452. The cubic root of 12621270 is about 232.8275415863.

Adding to 12621270 its reverse (7212621), we get a palindrome (19833891).

The spelling of 12621270 in words is "twelve million, six hundred twenty-one thousand, two hundred seventy".