2078145 has 12 divisors (see below), whose sum is σ = 3602196. Its totient is φ = 1108320.

The previous prime is 2078123. The next prime is 2078149. The reversal of 2078145 is 5418702.

It can be written as a sum of positive squares in 2 ways, for example, as 1218816 + 859329 = 1104^2 + 927^2 .

It is not a de Polignac number, because 2078145 - 2⁶ = 2078081 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2078149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23046 + ... + 23135.

It is an arithmetic number, because the mean of its divisors is an integer number (300183).

2^2078145 is an apocalyptic number.

It is an amenable number.

2078145 is a deficient number, since it is larger than the sum of its proper divisors (1524051).

2078145 is a wasteful number, since it uses less digits than its factorization.

2078145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46192 (or 46189 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2078145 is about 1441.5772611969. The cubic root of 2078145 is about 127.6121274297.

The spelling of 2078145 in words is "two million, seventy-eight thousand, one hundred forty-five".