2730421 has 8 divisors (see below), whose sum is σ = 2939544. Its totient is φ = 2526720.

The previous prime is 2730397. The next prime is 2730439. The reversal of 2730421 is 1240372.

It can be written as a sum of positive squares in 4 ways, for example, as 7921 + 2722500 = 89^2 + 1650^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2730421 - 2¹¹ = 2728373 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 (2730121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280 + ... + 2353.

It is an arithmetic number, because the mean of its divisors is an integer number (367443).

2^2730421 is an apocalyptic number.

It is an amenable number.

2730421 is a deficient number, since it is larger than the sum of its proper divisors (209123).

2730421 is a wasteful number, since it uses less digits than its factorization.

2730421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 2730421 is about 1652.3985596702. The cubic root of 2730421 is about 139.7686826383.

Adding to 2730421 its reverse (1240372), we get a palindrome (3970793).

The spelling of 2730421 in words is "two million, seven hundred thirty thousand, four hundred twenty-one".