12499001 has 2 divisors, whose sum is σ = 12499002. Its totient is φ = 12499000.

The previous prime is 12498989. The next prime is 12499021. The reversal of 12499001 is 10099421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12250000 + 249001 = 3500^2 + 499^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12499001 is a prime.

It is not a weakly prime, because it can be changed into another prime (12499021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6249500 + 6249501.

It is an arithmetic number, because the mean of its divisors is an integer number (6249501).

Almost surely, 2^12499001 is an apocalyptic number.

It is an amenable number.

12499001 is a deficient number, since it is larger than the sum of its proper divisors (1).

12499001 is an equidigital number, since it uses as much as digits as its factorization.

12499001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 12499001 is about 3535.3926231750. The cubic root of 12499001 is about 232.0732589196.

The spelling of 12499001 in words is "twelve million, four hundred ninety-nine thousand, one".