2145738 has 32 divisors (see below), whose sum is σ = 5013504. Its totient is φ = 599472.

The previous prime is 2145721. The next prime is 2145763. The reversal of 2145738 is 8375412.

2145738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 1431 + ... + 2517.

It is an arithmetic number, because the mean of its divisors is an integer number (156672).

2^2145738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2506752).

2145738 is an abundant number, since it is smaller than the sum of its proper divisors (2867766).

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

2145738 is a wasteful number, since it uses less digits than its factorization.

2145738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1146.

The product of its digits is 6720, while the sum is 30.

The square root of 2145738 is about 1464.8337789661. The cubic root of 2145738 is about 128.9809478503.

The spelling of 2145738 in words is "two million, one hundred forty-five thousand, seven hundred thirty-eight".