2172361 has 8 divisors (see below), whose sum is σ = 2265480. Its totient is φ = 2080512.

The previous prime is 2172347. The next prime is 2172367. The reversal of 2172361 is 1632712.

It can be written as a sum of positive squares in 4 ways, for example, as 366025 + 1806336 = 605^2 + 1344^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2172361 - 2²¹ = 75209 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2172367) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4801 + ... + 5233.

It is an arithmetic number, because the mean of its divisors is an integer number (283185).

2^2172361 is an apocalyptic number.

It is an amenable number.

2172361 is a deficient number, since it is larger than the sum of its proper divisors (93119).

2172361 is a wasteful number, since it uses less digits than its factorization.

2172361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its digits is 504, while the sum is 22.

The square root of 2172361 is about 1473.8931440237. The cubic root of 2172361 is about 129.5121955490.

The spelling of 2172361 in words is "two million, one hundred seventy-two thousand, three hundred sixty-one".