3240421 has 4 divisors (see below), whose sum is σ = 3431052. Its totient is φ = 3049792.

The previous prime is 3240409. The next prime is 3240449. The reversal of 3240421 is 1240423.

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 2160900 + 1079521 = 1470^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 3240421 - 2⁵ = 3240389 is a prime.

It is a Duffinian number.

3240421 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3240395 and 3240404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3240451) 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, 95290 + ... + 95323.

It is an arithmetic number, because the mean of its divisors is an integer number (857763).

Almost surely, 2^3240421 is an apocalyptic number.

It is an amenable number.

3240421 is a deficient number, since it is larger than the sum of its proper divisors (190631).

3240421 is a wasteful number, since it uses less digits than its factorization.

3240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190630.

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 3240421 is about 1800.1169406458. The cubic root of 3240421 is about 147.9791332889.

Adding to 3240421 its reverse (1240423), we get a palindrome (4480844).

The spelling of 3240421 in words is "three million, two hundred forty thousand, four hundred twenty-one".