2125181 has 2 divisors, whose sum is σ = 2125182. Its totient is φ = 2125180.

The previous prime is 2125163. The next prime is 2125219. The reversal of 2125181 is 1815212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1359556 + 765625 = 1166^2 + 875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2125181 is a prime.

It is a super-2 number, since 2×2125181² = 9032788565522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062590 + 1062591.

It is an arithmetic number, because the mean of its divisors is an integer number (1062591).

2^2125181 is an apocalyptic number.

It is an amenable number.

2125181 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125181 is an equidigital number, since it uses as much as digits as its factorization.

2125181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 160, while the sum is 20.

The square root of 2125181 is about 1457.8000548772. The cubic root of 2125181 is about 128.5677296408.

The spelling of 2125181 in words is "two million, one hundred twenty-five thousand, one hundred eighty-one".