2164418 has 4 divisors (see below), whose sum is σ = 3246630. Its totient is φ = 1082208.

The previous prime is 2164417. The next prime is 2164429. The reversal of 2164418 is 8144612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1545049 + 619369 = 1243^2 + 787^2 .

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 6⁶ + 4⁶ + 4⁷ + 1 + 8⁷ .

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541103 + ... + 541106.

2^2164418 is an apocalyptic number.

2164418 is a deficient number, since it is larger than the sum of its proper divisors (1082212).

2164418 is a wasteful number, since it uses less digits than its factorization.

2164418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082211.

The product of its digits is 1536, while the sum is 26.

The square root of 2164418 is about 1471.1961120123. The cubic root of 2164418 is about 129.3541537199.

The spelling of 2164418 in words is "two million, one hundred sixty-four thousand, four hundred eighteen".