12621436 has 6 divisors (see below), whose sum is σ = 22087520. Its totient is φ = 6310716.

The previous prime is 12621421. The next prime is 12621451. The reversal of 12621436 is 63412621.

It is an interprime number because it is at equal distance from previous prime (12621421) and next prime (12621451).

It is a self number, because there is not a number n which added to its sum of digits gives 12621436.

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 as a sum of consecutive naturals, namely, 1577676 + ... + 1577683.

Almost surely, 2^12621436 is an apocalyptic number.

It is an amenable number.

12621436 is a deficient number, since it is larger than the sum of its proper divisors (9466084).

12621436 is a wasteful number, since it uses less digits than its factorization.

12621436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3155363 (or 3155361 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 12621436 is about 3552.6660411584. Note that the first 3 decimals coincide. The cubic root of 12621436 is about 232.8285623289.

The spelling of 12621436 in words is "twelve million, six hundred twenty-one thousand, four hundred thirty-six".