2140345 has 12 divisors (see below), whose sum is σ = 2665260. Its totient is φ = 1649984.

The previous prime is 2140337. The next prime is 2140349. The reversal of 2140345 is 5430412.

It can be written as a sum of positive squares in 6 ways, for example, as 32041 + 2108304 = 179^2 + 1452^2 .

It is not a de Polignac number, because 2140345 - 2³ = 2140337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2140349) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3951 + ... + 4459.

It is an arithmetic number, because the mean of its divisors is an integer number (222105).

2^2140345 is an apocalyptic number.

It is an amenable number.

2140345 is a deficient number, since it is larger than the sum of its proper divisors (524915).

2140345 is an equidigital number, since it uses as much as digits as its factorization.

2140345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572 (or 543 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 2140345 is about 1462.9917976530. The cubic root of 2140345 is about 128.8727989174.

Adding to 2140345 its reverse (5430412), we get a palindrome (7570757).

It can be divided in two parts, 2140 and 345, that added together give a triangular number (2485 = T₇₀).

The spelling of 2140345 in words is "two million, one hundred forty thousand, three hundred forty-five".