2165146 has 4 divisors (see below), whose sum is σ = 3247722. Its totient is φ = 1082572.

The previous prime is 2165143. The next prime is 2165147. The reversal of 2165146 is 6415612.

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., 2134521 + 30625 = 1461^2 + 175^2 .

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2165146.

It is not an unprimeable number, because it can be changed into a prime (2165143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541285 + ... + 541288.

2^2165146 is an apocalyptic number.

2165146 is a deficient number, since it is larger than the sum of its proper divisors (1082576).

2165146 is a wasteful number, since it uses less digits than its factorization.

2165146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082575.

The product of its digits is 1440, while the sum is 25.

The square root of 2165146 is about 1471.4435089394. The cubic root of 2165146 is about 129.3686548111.

The spelling of 2165146 in words is "two million, one hundred sixty-five thousand, one hundred forty-six".