2145802 has 4 divisors (see below), whose sum is σ = 3218706. Its totient is φ = 1072900.

The previous prime is 2145779. The next prime is 2145821. The reversal of 2145802 is 2085412.

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., 2105401 + 40401 = 1451^2 + 201^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a d-powerful number, because it can be written as 2²⁰ + 1 + 4⁴ + 5⁶ + 8⁵ + 0 + 2²⁰ .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536449 + ... + 536452.

2^2145802 is an apocalyptic number.

2145802 is a deficient number, since it is larger than the sum of its proper divisors (1072904).

2145802 is a wasteful number, since it uses less digits than its factorization.

2145802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072903.

The product of its (nonzero) digits is 640, while the sum is 22.

The square root of 2145802 is about 1464.8556242852. The cubic root of 2145802 is about 128.9822301906.

The spelling of 2145802 in words is "two million, one hundred forty-five thousand, eight hundred two".