2145138 has 32 divisors (see below), whose sum is σ = 4669440. Its totient is φ = 654480.

The previous prime is 2145137. The next prime is 2145151. The reversal of 2145138 is 8315412.

2145138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3231 + ... + 3837.

It is an arithmetic number, because the mean of its divisors is an integer number (145920).

2^2145138 is an apocalyptic number.

2145138 is an abundant number, since it is smaller than the sum of its proper divisors (2524302).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2145138 is a wasteful number, since it uses less digits than its factorization.

2145138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662.

The product of its digits is 960, while the sum is 24.

The square root of 2145138 is about 1464.6289632532. The cubic root of 2145138 is about 128.9689246703.

The spelling of 2145138 in words is "two million, one hundred forty-five thousand, one hundred thirty-eight".