2143345 has 8 divisors (see below), whose sum is σ = 2580840. Its totient is φ = 1708800.

The previous prime is 2143331. The next prime is 2143369. The reversal of 2143345 is 5433412.

It can be written as a sum of positive squares in 4 ways, for example, as 781456 + 1361889 = 884^2 + 1167^2 .

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

It is not a de Polignac number, because 2143345 - 2⁵ = 2143313 is a prime.

It is a nialpdrome in base 12.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1471 + ... + 2539.

It is an arithmetic number, because the mean of its divisors is an integer number (322605).

2^2143345 is an apocalyptic number.

It is an amenable number.

2143345 is a deficient number, since it is larger than the sum of its proper divisors (437495).

2143345 is a wasteful number, since it uses less digits than its factorization.

2143345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475.

The product of its digits is 1440, while the sum is 22.

The square root of 2143345 is about 1464.0167348770. The cubic root of 2143345 is about 128.9329820349.

Adding to 2143345 its reverse (5433412), we get a palindrome (7576757).

The spelling of 2143345 in words is "two million, one hundred forty-three thousand, three hundred forty-five".