12503661 has 8 divisors (see below), whose sum is σ = 16764384. Its totient is φ = 8289360.

The previous prime is 12503641. The next prime is 12503663. The reversal of 12503661 is 16630521.

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

It is not a de Polignac number, because 12503661 - 2⁹ = 12503149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12503663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10971 + ... + 12056.

It is an arithmetic number, because the mean of its divisors is an integer number (2095548).

Almost surely, 2^12503661 is an apocalyptic number.

It is an amenable number.

12503661 is a deficient number, since it is larger than the sum of its proper divisors (4260723).

12503661 is a wasteful number, since it uses less digits than its factorization.

12503661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23211.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 12503661 is about 3536.0516116143. The cubic root of 12503661 is about 232.1020966114.

The spelling of 12503661 in words is "twelve million, five hundred three thousand, six hundred sixty-one".