2740145 has 8 divisors (see below), whose sum is σ = 3481704. Its totient is φ = 2063104.

The previous prime is 2740141. The next prime is 2740169. The reversal of 2740145 is 5410472.

It can be written as a sum of positive squares in 4 ways, for example, as 1366561 + 1373584 = 1169^2 + 1172^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2740145 - 2² = 2740141 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2740145.

It is not an unprimeable number, because it can be changed into a prime (2740141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16034 + ... + 16203.

It is an arithmetic number, because the mean of its divisors is an integer number (435213).

2^2740145 is an apocalyptic number.

It is an amenable number.

2740145 is a deficient number, since it is larger than the sum of its proper divisors (741559).

2740145 is a wasteful number, since it uses less digits than its factorization.

2740145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32259.

The product of its (nonzero) digits is 1120, while the sum is 23.

The square root of 2740145 is about 1655.3383339970. The cubic root of 2740145 is about 139.9344080496.

Subtracting from 2740145 its product of nonzero digits (1120), we obtain a square (2739025 = 1655²).

The spelling of 2740145 in words is "two million, seven hundred forty thousand, one hundred forty-five".