2140545 has 16 divisors (see below), whose sum is σ = 3736512. Its totient is φ = 1037760.

The previous prime is 2140543. The next prime is 2140549. The reversal of 2140545 is 5450412.

It is not a de Polignac number, because 2140545 - 2¹ = 2140543 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2140543) 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, 6322 + ... + 6651.

It is an arithmetic number, because the mean of its divisors is an integer number (233532).

2^2140545 is an apocalyptic number.

It is an amenable number.

2140545 is a deficient number, since it is larger than the sum of its proper divisors (1595967).

2140545 is a wasteful number, since it uses less digits than its factorization.

2140545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12992.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 2140545 is about 1463.0601491395. The cubic root of 2140545 is about 128.8768128742.

Adding to 2140545 its reverse (5450412), we get a palindrome (7590957).

The spelling of 2140545 in words is "two million, one hundred forty thousand, five hundred forty-five".