2143307 has 4 divisors (see below), whose sum is σ = 2147040. Its totient is φ = 2139576.

The previous prime is 2143279. The next prime is 2143313. The reversal of 2143307 is 7033412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2143307 - 2⁶ = 2143243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803 + ... + 2220.

It is an arithmetic number, because the mean of its divisors is an integer number (536760).

2^2143307 is an apocalyptic number.

2143307 is a deficient number, since it is larger than the sum of its proper divisors (3733).

2143307 is an equidigital number, since it uses as much as digits as its factorization.

2143307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3732.

The product of its (nonzero) digits is 504, while the sum is 20.

The square root of 2143307 is about 1464.0037568258. The cubic root of 2143307 is about 128.9322200666.

Adding to 2143307 its reverse (7033412), we get a palindrome (9176719).

The spelling of 2143307 in words is "two million, one hundred forty-three thousand, three hundred seven".