2159145 has 12 divisors (see below), whose sum is σ = 3742596. Its totient is φ = 1151520.

The previous prime is 2159093. The next prime is 2159147. The reversal of 2159145 is 5419512.

It can be written as a sum of positive squares in 2 ways, for example, as 660969 + 1498176 = 813^2 + 1224^2 .

It is not a de Polignac number, because 2159145 - 2⁶ = 2159081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2159147) 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, 23946 + ... + 24035.

It is an arithmetic number, because the mean of its divisors is an integer number (311883).

2^2159145 is an apocalyptic number.

It is an amenable number.

2159145 is a deficient number, since it is larger than the sum of its proper divisors (1583451).

2159145 is a wasteful number, since it uses less digits than its factorization.

2159145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47992 (or 47989 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 2159145 is about 1469.4029399726. The cubic root of 2159145 is about 129.2490232097.

It can be divided in two parts, 2159 and 145, that added together give a square (2304 = 48²).

The spelling of 2159145 in words is "two million, one hundred fifty-nine thousand, one hundred forty-five".