12661370 has 16 divisors (see below), whose sum is σ = 22832928. Its totient is φ = 5055120.

The previous prime is 12661357. The next prime is 12661373. The reversal of 12661370 is 7316621.

It is not an unprimeable number, because it can be changed into a prime (12661373) 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 7 ways as a sum of consecutive naturals, for example, 7505 + ... + 9035.

It is an arithmetic number, because the mean of its divisors is an integer number (1427058).

Almost surely, 2^12661370 is an apocalyptic number.

12661370 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12661370 is a deficient number, since it is larger than the sum of its proper divisors (10171558).

12661370 is a wasteful number, since it uses less digits than its factorization.

12661370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2365.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 12661370 is about 3558.2818887772. The cubic root of 12661370 is about 233.0738589552.

Adding to 12661370 its reverse (7316621), we get a palindrome (19977991).

It can be divided in two parts, 12661 and 370, that added together give a palindrome (13031).

The spelling of 12661370 in words is "twelve million, six hundred sixty-one thousand, three hundred seventy".