2140305 has 16 divisors (see below), whose sum is σ = 3462144. Its totient is φ = 1128960.

The previous prime is 2140301. The next prime is 2140309. The reversal of 2140305 is 5030412.

It is an interprime number because it is at equal distance from previous prime (2140301) and next prime (2140309).

It is not a de Polignac number, because 2140305 - 2² = 2140301 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

2140305 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2140301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 720 + ... + 2190.

It is an arithmetic number, because the mean of its divisors is an integer number (216384).

2^2140305 is an apocalyptic number.

It is an amenable number.

2140305 is a deficient number, since it is larger than the sum of its proper divisors (1321839).

2140305 is a wasteful number, since it uses less digits than its factorization.

2140305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1576.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2140305 is about 1462.9781269725. The cubic root of 2140305 is about 128.8719960960.

Adding to 2140305 its reverse (5030412), we get a palindrome (7170717).

The spelling of 2140305 in words is "two million, one hundred forty thousand, three hundred five".