2164642 has 4 divisors (see below), whose sum is σ = 3246966. Its totient is φ = 1082320.

The previous prime is 2164639. The next prime is 2164681. The reversal of 2164642 is 2464612.

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., 1279161 + 885481 = 1131^2 + 941^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541159 + ... + 541162.

2^2164642 is an apocalyptic number.

2164642 is a deficient number, since it is larger than the sum of its proper divisors (1082324).

2164642 is a wasteful number, since it uses less digits than its factorization.

2164642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082323.

The product of its digits is 2304, while the sum is 25.

The square root of 2164642 is about 1471.2722385745. The cubic root of 2164642 is about 129.3586159404.

The spelling of 2164642 in words is "two million, one hundred sixty-four thousand, six hundred forty-two".