2145704 has 32 divisors (see below), whose sum is σ = 4514400. Its totient is φ = 947520.

The previous prime is 2145683. The next prime is 2145707. The reversal of 2145704 is 4075412.

It is a self number, because there is not a number n which added to its sum of digits gives 2145704.

It is not an unprimeable number, because it can be changed into a prime (2145707) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2927 + ... + 3585.

It is an arithmetic number, because the mean of its divisors is an integer number (141075).

2^2145704 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2145704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2257200).

2145704 is an abundant number, since it is smaller than the sum of its proper divisors (2368696).

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

2145704 is a wasteful number, since it uses less digits than its factorization.

2145704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 713 (or 709 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 2145704 is about 1464.8221735078. The cubic root of 2145704 is about 128.9802665967.

The spelling of 2145704 in words is "two million, one hundred forty-five thousand, seven hundred four".