2145072 has 80 divisors (see below), whose sum is σ = 6071040. Its totient is φ = 650496.

The previous prime is 2145067. The next prime is 2145083. The reversal of 2145072 is 2705412.

It is an alternating number because its digits alternate between even and odd.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31983 + ... + 32049.

It is an arithmetic number, because the mean of its divisors is an integer number (75888).

2^2145072 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 2145072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3035520).

2145072 is an abundant number, since it is smaller than the sum of its proper divisors (3925968).

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

2145072 is a wasteful number, since it uses less digits than its factorization.

2145072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 21.

The square root of 2145072 is about 1464.6064317761. The cubic root of 2145072 is about 128.9676019836.

The spelling of 2145072 in words is "two million, one hundred forty-five thousand, seventy-two".