2743421 has 4 divisors (see below), whose sum is σ = 2768700. Its totient is φ = 2718144.

The previous prime is 2743397. The next prime is 2743423. The reversal of 2743421 is 1243472.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1276900 + 1466521 = 1130^2 + 1211^2 .

It is a cyclic number.

It is not a de Polignac number, because 2743421 - 2¹⁴ = 2727037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2743423) 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, 12476 + ... + 12693.

It is an arithmetic number, because the mean of its divisors is an integer number (692175).

2^2743421 is an apocalyptic number.

It is an amenable number.

2743421 is a deficient number, since it is larger than the sum of its proper divisors (25279).

2743421 is a wasteful number, since it uses less digits than its factorization.

2743421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25278.

The product of its digits is 1344, while the sum is 23.

The square root of 2743421 is about 1656.3275642215. The cubic root of 2743421 is about 139.9901523686.

Adding to 2743421 its reverse (1243472), we get a palindrome (3986893).

The spelling of 2743421 in words is "two million, seven hundred forty-three thousand, four hundred twenty-one".