2149743 has 4 divisors (see below), whose sum is σ = 2866328. Its totient is φ = 1433160.

The previous prime is 2149727. The next prime is 2149781. The reversal of 2149743 is 3479412.

It is a happy number.

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

It is not a de Polignac number, because 2149743 - 2⁴ = 2149727 is a prime.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2149743.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2149703) 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, 358288 + ... + 358293.

It is an arithmetic number, because the mean of its divisors is an integer number (716582).

2^2149743 is an apocalyptic number.

2149743 is a deficient number, since it is larger than the sum of its proper divisors (716585).

2149743 is an equidigital number, since it uses as much as digits as its factorization.

2149743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716584.

The product of its digits is 6048, while the sum is 30.

The square root of 2149743 is about 1466.2001909698. The cubic root of 2149743 is about 129.0611452212.

The spelling of 2149743 in words is "two million, one hundred forty-nine thousand, seven hundred forty-three".