12250001 has 4 divisors (see below), whose sum is σ = 12272100. Its totient is φ = 12227904.

The previous prime is 12249989. The next prime is 12250009. The reversal of 12250001 is 10005221.

12250001 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 3500²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10005221 = 379 ⋅26399.

It can be written as a sum of positive squares in 2 ways, for example, as 2016400 + 10233601 = 1420^2 + 3199^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12250001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12250009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10196 + ... + 11333.

It is an arithmetic number, because the mean of its divisors is an integer number (3068025).

Almost surely, 2^12250001 is an apocalyptic number.

It is an amenable number.

12250001 is a deficient number, since it is larger than the sum of its proper divisors (22099).

12250001 is an equidigital number, since it uses as much as digits as its factorization.

12250001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22098.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 12250001 is about 3500.0001428571. Note that the first 3 decimals coincide. The cubic root of 12250001 is about 230.5218208756.

Adding to 12250001 its reverse (10005221), we get a palindrome (22255222).

The spelling of 12250001 in words is "twelve million, two hundred fifty thousand, one".