12500945 has 8 divisors (see below), whose sum is σ = 15024744. Its totient is φ = 9985024.

The previous prime is 12500921. The next prime is 12500953. The reversal of 12500945 is 54900521.

It can be written as a sum of positive squares in 4 ways, for example, as 5053504 + 7447441 = 2248^2 + 2729^2 .

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 12500945 - 2²⁰ = 11452369 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2417 + ... + 5553.

It is an arithmetic number, because the mean of its divisors is an integer number (1878093).

Almost surely, 2^12500945 is an apocalyptic number.

It is an amenable number.

12500945 is a deficient number, since it is larger than the sum of its proper divisors (2523799).

12500945 is an equidigital number, since it uses as much as digits as its factorization.

12500945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3939.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 12500945 is about 3535.6675465886. The cubic root of 12500945 is about 232.0852899352.

The spelling of 12500945 in words is "twelve million, five hundred thousand, nine hundred forty-five".