2143407 has 16 divisors (see below), whose sum is σ = 3334400. Its totient is φ = 1224216.

The previous prime is 2143391. The next prime is 2143417. The reversal of 2143407 is 7043412.

2143407 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2143407 - 2⁴ = 2143391 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13 + ... + 2070.

It is an arithmetic number, because the mean of its divisors is an integer number (208400).

2^2143407 is an apocalyptic number.

2143407 is a deficient number, since it is larger than the sum of its proper divisors (1190993).

2143407 is an equidigital number, since it uses as much as digits as its factorization.

2143407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107 (or 2093 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 2143407 is about 1464.0379093452. The cubic root of 2143407 is about 128.9342252268.

Adding to 2143407 its reverse (7043412), we get a palindrome (9186819).

The spelling of 2143407 in words is "two million, one hundred forty-three thousand, four hundred seven".