2172461 has 2 divisors, whose sum is σ = 2172462. Its totient is φ = 2172460.

The previous prime is 2172433. The next prime is 2172473. The reversal of 2172461 is 1642712.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1562500 + 609961 = 1250^2 + 781^2 .

It is a cyclic number.

It is not a de Polignac number, because 2172461 - 2⁶ = 2172397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2172491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1086230 + 1086231.

It is an arithmetic number, because the mean of its divisors is an integer number (1086231).

2^2172461 is an apocalyptic number.

It is an amenable number.

2172461 is a deficient number, since it is larger than the sum of its proper divisors (1).

2172461 is an equidigital number, since it uses as much as digits as its factorization.

2172461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 672, while the sum is 23.

The square root of 2172461 is about 1473.9270673951. The cubic root of 2172461 is about 129.5141827909.

The spelling of 2172461 in words is "two million, one hundred seventy-two thousand, four hundred sixty-one".