2143437 has 4 divisors (see below), whose sum is σ = 2857920. Its totient is φ = 1428956.

The previous prime is 2143417. The next prime is 2143441. The reversal of 2143437 is 7343412.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2143437 is a prime.

It is a D-number.

2143437 is a lucky 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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357237 + ... + 357242.

It is an arithmetic number, because the mean of its divisors is an integer number (714480).

2^2143437 is an apocalyptic number.

It is an amenable number.

2143437 is a deficient number, since it is larger than the sum of its proper divisors (714483).

2143437 is an equidigital number, since it uses as much as digits as its factorization.

2143437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714482.

The product of its digits is 2016, while the sum is 24.

The square root of 2143437 is about 1464.0481549457. The cubic root of 2143437 is about 128.9348267627.

Adding to 2143437 its reverse (7343412), we get a palindrome (9486849).

The spelling of 2143437 in words is "two million, one hundred forty-three thousand, four hundred thirty-seven".