2172418 has 16 divisors (see below), whose sum is σ = 3458304. Its totient is φ = 1021680.

The previous prime is 2172397. The next prime is 2172427. The reversal of 2172418 is 8142712.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2172392 and 2172401.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1821 + ... + 2767.

It is an arithmetic number, because the mean of its divisors is an integer number (216144).

2^2172418 is an apocalyptic number.

2172418 is a deficient number, since it is larger than the sum of its proper divisors (1285886).

2172418 is a wasteful number, since it uses less digits than its factorization.

2172418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017.

The product of its digits is 896, while the sum is 25.

The square root of 2172418 is about 1473.9124804411. The cubic root of 2172418 is about 129.5133282844.

The spelling of 2172418 in words is "two million, one hundred seventy-two thousand, four hundred eighteen".