2172901 has 2 divisors, whose sum is σ = 2172902. Its totient is φ = 2172900.

The previous prime is 2172893. The next prime is 2172917. The reversal of 2172901 is 1092712.

2172901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2172676 + 225 = 1474^2 + 15^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172901 - 2³ = 2172893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086450 + 1086451.

It is an arithmetic number, because the mean of its divisors is an integer number (1086451).

2^2172901 is an apocalyptic number.

It is an amenable number.

2172901 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172901 is an equidigital number, since it uses as much as digits as its factorization.

2172901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 22.

The square root of 2172901 is about 1474.0763209549. The cubic root of 2172901 is about 129.5229259312.

The spelling of 2172901 in words is "two million, one hundred seventy-two thousand, nine hundred one".