12621985 has 8 divisors (see below), whose sum is σ = 15943680. Its totient is φ = 9566064.

The previous prime is 12621979. The next prime is 12621997. The reversal of 12621985 is 58912621.

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

It is a cyclic number.

It is not a de Polignac number, because 12621985 - 2³ = 12621977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12621985.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66337 + ... + 66526.

It is an arithmetic number, because the mean of its divisors is an integer number (1992960).

Almost surely, 2^12621985 is an apocalyptic number.

It is an amenable number.

12621985 is a deficient number, since it is larger than the sum of its proper divisors (3321695).

12621985 is a wasteful number, since it uses less digits than its factorization.

12621985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132887.

The product of its digits is 8640, while the sum is 34.

The square root of 12621985 is about 3552.7433062353. The cubic root of 12621985 is about 232.8319380945.

The spelling of 12621985 in words is "twelve million, six hundred twenty-one thousand, nine hundred eighty-five".