2145320 has 16 divisors (see below), whose sum is σ = 4827060. Its totient is φ = 858112.

The previous prime is 2145307. The next prime is 2145329. The reversal of 2145320 is 235412.

It can be written as a sum of positive squares in 2 ways, for example, as 1999396 + 145924 = 1414^2 + 382^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2145329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26777 + ... + 26856.

2^2145320 is an apocalyptic number.

2145320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2145320 is an abundant number, since it is smaller than the sum of its proper divisors (2681740).

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

2145320 is a wasteful number, since it uses less digits than its factorization.

2145320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53644 (or 53640 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2145320 is about 1464.6910937123. The cubic root of 2145320 is about 128.9725719384.

The spelling of 2145320 in words is "two million, one hundred forty-five thousand, three hundred twenty".