12621753 has 6 divisors (see below), whose sum is σ = 18231434. Its totient is φ = 8414496.

The previous prime is 12621731. The next prime is 12621767. The reversal of 12621753 is 35712621.

It is a happy number.

12621753 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9809424 + 2812329 = 3132^2 + 1677^2 .

It is not a de Polignac number, because 12621753 - 2⁹ = 12621241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12621703) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 701200 + ... + 701217.

Almost surely, 2^12621753 is an apocalyptic number.

It is an amenable number.

12621753 is a deficient number, since it is larger than the sum of its proper divisors (5609681).

12621753 is a wasteful number, since it uses less digits than its factorization.

12621753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402423 (or 1402420 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 12621753 is about 3552.7106552603. The cubic root of 12621753 is about 232.8305115534.

The spelling of 12621753 in words is "twelve million, six hundred twenty-one thousand, seven hundred fifty-three".