613421 has 2 divisors, whose sum is σ = 613422. Its totient is φ = 613420.

The previous prime is 613381. The next prime is 613427. The reversal of 613421 is 124316.

613421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 373321 + 240100 = 611^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 613421 - 2⁶ = 613357 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 613421.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 613421.

It is not a weakly prime, because it can be changed into another prime (613427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306710 + 306711.

It is an arithmetic number, because the mean of its divisors is an integer number (306711).

2⁶¹³⁴²¹ is an apocalyptic number.

It is an amenable number.

613421 is a deficient number, since it is larger than the sum of its proper divisors (1).

613421 is an equidigital number, since it uses as much as digits as its factorization.

613421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 144, while the sum is 17.

The square root of 613421 is about 783.2119764151. The cubic root of 613421 is about 84.9675077656.

Adding to 613421 its reverse (124316), we get a palindrome (737737).

The spelling of 613421 in words is "six hundred thirteen thousand, four hundred twenty-one".