12661562 has 16 divisors (see below), whose sum is σ = 20196000. Its totient is φ = 5936400.

The previous prime is 12661499. The next prime is 12661589. The reversal of 12661562 is 26516621.

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 7 ways as a sum of consecutive naturals, for example, 2189 + ... + 5487.

It is an arithmetic number, because the mean of its divisors is an integer number (1262250).

Almost surely, 2^12661562 is an apocalyptic number.

12661562 is a deficient number, since it is larger than the sum of its proper divisors (7534438).

12661562 is a wasteful number, since it uses less digits than its factorization.

12661562 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421.

The product of its digits is 4320, while the sum is 29.

The square root of 12661562 is about 3558.3088679877. The cubic root of 12661562 is about 233.0750370782.

The spelling of 12661562 in words is "twelve million, six hundred sixty-one thousand, five hundred sixty-two".