621413 has 6 divisors (see below), whose sum is σ = 673074. Its totient is φ = 573456.

The previous prime is 621389. The next prime is 621419. The reversal of 621413 is 314126.

It can be written as a sum of positive squares in 3 ways, for example, as 16129 + 605284 = 127^2 + 778^2 .

It is a de Polignac number, because none of the positive numbers 2^k-621413 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 621391 and 621400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621419) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1670 + ... + 2007.

It is an arithmetic number, because the mean of its divisors is an integer number (112179).

2⁶²¹⁴¹³ is an apocalyptic number.

It is an amenable number.

621413 is a deficient number, since it is larger than the sum of its proper divisors (51661).

621413 is a wasteful number, since it uses less digits than its factorization.

621413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703 (or 3690 counting only the distinct ones).

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

The square root of 621413 is about 788.2975326614. The cubic root of 621413 is about 85.3349185225.

Adding to 621413 its reverse (314126), we get a palindrome (935539).

The spelling of 621413 in words is "six hundred twenty-one thousand, four hundred thirteen".