12621740 has 24 divisors (see below), whose sum is σ = 26587680. Its totient is φ = 5033088.

The previous prime is 12621731. The next prime is 12621767. The reversal of 12621740 is 4712621.

12621740 is nontrivially palindromic in base 3.

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, 7409 + ... + 8951.

It is an arithmetic number, because the mean of its divisors is an integer number (1107820).

Almost surely, 2^12621740 is an apocalyptic number.

12621740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12621740 is an abundant number, since it is smaller than the sum of its proper divisors (13965940).

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

12621740 is a wasteful number, since it uses less digits than its factorization.

12621740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1961 (or 1959 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 23.

The square root of 12621740 is about 3552.7088256709. The cubic root of 12621740 is about 232.8304316174.

The spelling of 12621740 in words is "twelve million, six hundred twenty-one thousand, seven hundred forty".